21342310122 has 32 divisors (see below), whose sum is σ = 49166548992. Its totient is φ = 6049787184.

The previous prime is 21342310111. The next prime is 21342310147. The reversal of 21342310122 is 22101324312.

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

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 in 15 ways as a sum of consecutive naturals, for example, 1995258 + ... + 2005925.

It is an arithmetic number, because the mean of its divisors is an integer number (1536454656).

Almost surely, 2^21342310122 is an apocalyptic number.

21342310122 is an abundant number, since it is smaller than the sum of its proper divisors (27824238870).

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

21342310122 is a wasteful number, since it uses less digits than its factorization.

21342310122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001322.

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

Adding to 21342310122 its reverse (22101324312), we get a palindrome (43443634434).

The spelling of 21342310122 in words is "twenty-one billion, three hundred forty-two million, three hundred ten thousand, one hundred twenty-two".