21221021096 has 16 divisors (see below), whose sum is σ = 43406634240. Its totient is φ = 9645918640.

The previous prime is 21221021021. The next prime is 21221021113. The reversal of 21221021096 is 69012012212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120573896 + ... + 120574071.

It is an arithmetic number, because the mean of its divisors is an integer number (2712914640).

Almost surely, 2^21221021096 is an apocalyptic number.

It is an amenable number.

21221021096 is an abundant number, since it is smaller than the sum of its proper divisors (22185613144).

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

21221021096 is a wasteful number, since it uses less digits than its factorization.

21221021096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241147984 (or 241147980 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21221021096 in words is "twenty-one billion, two hundred twenty-one million, twenty-one thousand, ninety-six".