21012433199631 has 24 divisors (see below), whose sum is σ = 31476594523920. Its totient is φ = 14007763553472.

The previous prime is 21012433199629. The next prime is 21012433199663. The reversal of 21012433199631 is 13699133421012.

21012433199631 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 2 + 4 + 3 + 3 + 1 + 9 + 9 + 631 = 666.

It is not a de Polignac number, because 21012433199631 - 2¹ = 21012433199629 is a prime.

It is a super-2 number, since 2×21012433199631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012433199621) 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 23 ways as a sum of consecutive naturals, for example, 4927315 + ... + 8142683.

It is an arithmetic number, because the mean of its divisors is an integer number (1311524771830).

Almost surely, 2^{21012433199631} is an apocalyptic number.

21012433199631 is a deficient number, since it is larger than the sum of its proper divisors (10464161324289).

21012433199631 is an equidigital number, since it uses as much as digits as its factorization.

21012433199631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242277 (or 3242265 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 21012433199631 in words is "twenty-one trillion, twelve billion, four hundred thirty-three million, one hundred ninety-nine thousand, six hundred thirty-one".