21012024512 has 28 divisors (see below), whose sum is σ = 41772876576. Its totient is φ = 10486575360.

The previous prime is 21012024493. The next prime is 21012024521. The reversal of 21012024512 is 21542021012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268808 + ... + 338055.

Almost surely, 2^21012024512 is an apocalyptic number.

It is an amenable number.

21012024512 is a deficient number, since it is larger than the sum of its proper divisors (20760852064).

21012024512 is an equidigital number, since it uses as much as digits as its factorization.

21012024512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607416 (or 607406 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 21012024512 its reverse (21542021012), we get a palindrome (42554045524).

The spelling of 21012024512 in words is "twenty-one billion, twelve million, twenty-four thousand, five hundred twelve".