21312000122232 has 16 divisors (see below), whose sum is σ = 53280000305640. Its totient is φ = 7104000040736.

The previous prime is 21312000122201. The next prime is 21312000122251. The reversal of 21312000122232 is 23222100021312.

It is a junction number, because it is equal to n+sod(n) for n = 21312000122199 and 21312000122208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444000002523 + ... + 444000002570.

Almost surely, 2^{21312000122232} is an apocalyptic number.

It is an amenable number.

21312000122232 is an abundant number, since it is smaller than the sum of its proper divisors (31968000183408).

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

21312000122232 is a wasteful number, since it uses less digits than its factorization.

21312000122232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888000005102 (or 888000005098 counting only the distinct ones).

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

Adding to 21312000122232 its reverse (23222100021312), we get a palindrome (44534100143544).

The spelling of 21312000122232 in words is "twenty-one trillion, three hundred twelve billion, one hundred twenty-two thousand, two hundred thirty-two".