Search a number
-
+
21020001120120 = 2335175166676001
BaseRepresentation
bin1001100011110000110011…
…01100110010111101111000
32202102111022000112002220110
410301320121230302331320
510223342430241320440
6112412242154024320
74266434136341322
oct461703154627570
982374260462813
1021020001120120
116774594707572
122435997a180a0
13b96240259ca2
14529532b9c612
15266ba24da080
hex131e19b32f78

21020001120120 has 32 divisors (see below), whose sum is σ = 63060003360720. Its totient is φ = 5605333632000.

The previous prime is 21020001120049. The next prime is 21020001120137. The reversal of 21020001120120 is 2102110002012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21020001120096 and 21020001120105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87583337881 + ... + 87583338120.

Almost surely, 221020001120120 is an apocalyptic number.

21020001120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020001120120 is an abundant number, since it is smaller than the sum of its proper divisors (42040002240600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21020001120120 is a wasteful number, since it uses less digits than its factorization.

21020001120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175166676015 (or 175166676011 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21020001120120 its reverse (2102110002012), we get a palindrome (23122111122132).

The spelling of 21020001120120 in words is "twenty-one trillion, twenty billion, one million, one hundred twenty thousand, one hundred twenty".

Divisors: 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 175166676001 350333352002 525500028003 700666704004 875833380005 1051000056006 1401333408008 1751666760010 2102000112012 2627500140015 3503333520020 4204000224024 5255000280030 7006667040040 10510000560060 21020001120120