21010140512 has 96 divisors (see below), whose sum is σ = 42889803264. Its totient is φ = 10126771200.

The previous prime is 21010140499. The next prime is 21010140551. The reversal of 21010140512 is 21504101012.

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, 21726653 + ... + 21727619.

It is an arithmetic number, because the mean of its divisors is an integer number (446768784).

Almost surely, 2^21010140512 is an apocalyptic number.

It is an amenable number.

21010140512 is an abundant number, since it is smaller than the sum of its proper divisors (21879662752).

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

21010140512 is a wasteful number, since it uses less digits than its factorization.

21010140512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 21010140512 its reverse (21504101012), we get a palindrome (42514241524).

The spelling of 21010140512 in words is "twenty-one billion, ten million, one hundred forty thousand, five hundred twelve".