21122343102 has 16 divisors (see below), whose sum is σ = 48279641472. Its totient is φ = 6034955160.

The previous prime is 21122343097. The next prime is 21122343113. The reversal of 21122343102 is 20134322112.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 251456424 + ... + 251456507.

It is an arithmetic number, because the mean of its divisors is an integer number (3017477592).

Almost surely, 2^21122343102 is an apocalyptic number.

21122343102 is an abundant number, since it is smaller than the sum of its proper divisors (27157298370).

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

21122343102 is a wasteful number, since it uses less digits than its factorization.

21122343102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502912943.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21122343102 its reverse (20134322112), we get a palindrome (41256665214).

The spelling of 21122343102 in words is "twenty-one billion, one hundred twenty-two million, three hundred forty-three thousand, one hundred two".