21011212296 has 64 divisors (see below), whose sum is σ = 58511731200. Its totient is φ = 6986067264.

The previous prime is 21011212273. The next prime is 21011212297. The reversal of 21011212296 is 69221211012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21011212297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36760 + ... + 208263.

It is an arithmetic number, because the mean of its divisors is an integer number (914245800).

Almost surely, 2^21011212296 is an apocalyptic number.

It is an amenable number.

21011212296 is an abundant number, since it is smaller than the sum of its proper divisors (37500518904).

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

21011212296 is a wasteful number, since it uses less digits than its factorization.

21011212296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245435 (or 245425 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 21011212296 in words is "twenty-one billion, eleven million, two hundred twelve thousand, two hundred ninety-six".