21022422012 has 36 divisors (see below), whose sum is σ = 53181546600. Its totient is φ = 7001996832.

The previous prime is 21022421999. The next prime is 21022422203.

21022422012 is a `hidden beast` number, since 210 + 22 + 422 + 0 + 12 = 666.

21022422012 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181387 + ... + 273762.

Almost surely, 2^21022422012 is an apocalyptic number.

It is an amenable number.

21022422012 is an abundant number, since it is smaller than the sum of its proper divisors (32159124588).

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

21022422012 is a wasteful number, since it uses less digits than its factorization.

21022422012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456442 (or 456437 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The spelling of 21022422012 in words is "twenty-one billion, twenty-two million, four hundred twenty-two thousand, twelve".