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21100010211 = 3272956920297
BaseRepresentation
bin10011101001101010…
…001001101011100011
32000110111101120120200
4103221222021223203
5321203100311321
613405422240243
71344610061520
oct235152115343
960414346520
1021100010211
118a48450a75
12410a426083
131cb3560157
141042428147
15837604d26
hex4e9a89ae3

21100010211 has 48 divisors (see below), whose sum is σ = 36097963200. Its totient is φ = 11620353024.

The previous prime is 21100010177. The next prime is 21100010213. The reversal of 21100010211 is 11201000112.

It is a happy number.

It is not a de Polignac number, because 21100010211 - 27 = 21100010083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21100010193 and 21100010202.

It is not an unprimeable number, because it can be changed into a prime (21100010213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1029415 + ... + 1049711.

It is an arithmetic number, because the mean of its divisors is an integer number (752040900).

Almost surely, 221100010211 is an apocalyptic number.

21100010211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21100010211 is a deficient number, since it is larger than the sum of its proper divisors (14997952989).

21100010211 is a wasteful number, since it uses less digits than its factorization.

21100010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20908 (or 20905 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21100010211 its reverse (11201000112), we get a palindrome (32301010323).

The spelling of 21100010211 in words is "twenty-one billion, one hundred million, ten thousand, two hundred eleven".

Divisors: 1 3 7 9 21 29 63 87 203 261 569 609 1707 1827 3983 5121 11949 16501 20297 35847 49503 60891 115507 142079 148509 182673 346521 426237 588613 1039563 1278711 1765839 4120291 5297517 11548993 12360873 34646979 37082619 80842951 103940937 242528853 334920797 727586559 1004762391 2344445579 3014287173 7033336737 21100010211