Search a number
-
+
21002120222 = 210501060111
BaseRepresentation
bin10011100011110100…
…101110110000011110
32000012200012020202112
4103203310232300132
5321003020321342
613352004154022
71342311035126
oct234364566036
960180166675
1021002120222
1189a8170856
1240a1698912
131c991a7b95
141033425c86
1582dc1a682
hex4e3d2ec1e

21002120222 has 4 divisors (see below), whose sum is σ = 31503180336. Its totient is φ = 10501060110.

The previous prime is 21002120213. The next prime is 21002120257. The reversal of 21002120222 is 22202120012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21002120197 and 21002120206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250530054 + ... + 5250530057.

It is an arithmetic number, because the mean of its divisors is an integer number (7875795084).

Almost surely, 221002120222 is an apocalyptic number.

21002120222 is a deficient number, since it is larger than the sum of its proper divisors (10501060114).

21002120222 is a wasteful number, since it uses less digits than its factorization.

21002120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501060113.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21002120222 its reverse (22202120012), we get a palindrome (43204240234).

The spelling of 21002120222 in words is "twenty-one billion, two million, one hundred twenty thousand, two hundred twenty-two".

Divisors: 1 2 10501060111 21002120222