21120212231232 has 56 divisors (see below), whose sum is σ = 56019914753952. Its totient is φ = 7022514432000.

The previous prime is 21120212231213. The next prime is 21120212231233. The reversal of 21120212231232 is 23213221202112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21120212231233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137081494 + ... + 137235477.

Almost surely, 2^{21120212231232} is an apocalyptic number.

It is an amenable number.

21120212231232 is an abundant number, since it is smaller than the sum of its proper divisors (34899702522720).

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

21120212231232 is a wasteful number, since it uses less digits than its factorization.

21120212231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274317387 (or 274317377 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21120212231232 its reverse (23213221202112), we get a palindrome (44333433433344).

The spelling of 21120212231232 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, two hundred thirty-one thousand, two hundred thirty-two".