21012300312312 has 32 divisors (see below), whose sum is σ = 52586813538000. Its totient is φ = 6996625069824.

The previous prime is 21012300312233. The next prime is 21012300312313. The reversal of 21012300312312 is 21321300321012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012300312313) 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, 467166687 + ... + 467211662.

Almost surely, 2^{21012300312312} is an apocalyptic number.

It is an amenable number.

21012300312312 is an abundant number, since it is smaller than the sum of its proper divisors (31574513225688).

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

21012300312312 is a wasteful number, since it uses less digits than its factorization.

21012300312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934379295 (or 934379291 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21012300312312 its reverse (21321300321012), we get a palindrome (42333600633324).

The spelling of 21012300312312 in words is "twenty-one trillion, twelve billion, three hundred million, three hundred twelve thousand, three hundred twelve".