21000031331032 has 64 divisors (see below), whose sum is σ = 43308895956480. Its totient is φ = 9485494526592.

The previous prime is 21000031331023. The next prime is 21000031331051. The reversal of 21000031331032 is 23013313000012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81026083 + ... + 81284845.

It is an arithmetic number, because the mean of its divisors is an integer number (676701499320).

Almost surely, 2^{21000031331032} is an apocalyptic number.

It is an amenable number.

21000031331032 is an abundant number, since it is smaller than the sum of its proper divisors (22308864625448).

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

21000031331032 is a wasteful number, since it uses less digits than its factorization.

21000031331032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275432 (or 275428 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21000031331032 its reverse (23013313000012), we get a palindrome (44013344331044).

The spelling of 21000031331032 in words is "twenty-one trillion, thirty-one million, three hundred thirty-one thousand, thirty-two".