21322123122 has 16 divisors (see below), whose sum is σ = 43343332992. Its totient is φ = 6990859920.

The previous prime is 21322123111. The next prime is 21322123127. The reversal of 21322123122 is 22132122312.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21322123127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29128218 + ... + 29128949.

It is an arithmetic number, because the mean of its divisors is an integer number (2708958312).

Almost surely, 2^21322123122 is an apocalyptic number.

21322123122 is an abundant number, since it is smaller than the sum of its proper divisors (22021209870).

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

21322123122 is a wasteful number, since it uses less digits than its factorization.

21322123122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58257233.

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

Adding to 21322123122 its reverse (22132122312), we get a palindrome (43454245434).

The spelling of 21322123122 in words is "twenty-one billion, three hundred twenty-two million, one hundred twenty-three thousand, one hundred twenty-two".