21213522112 has 28 divisors (see below), whose sum is σ = 42489013320. Its totient is φ = 10507629056.

The previous prime is 21213522101. The next prime is 21213522149. The reversal of 21213522112 is 21122531212.

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, 1542037 + ... + 1555732.

Almost surely, 2^21213522112 is an apocalyptic number.

It is an amenable number.

21213522112 is an abundant number, since it is smaller than the sum of its proper divisors (21275491208).

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

21213522112 is a wasteful number, since it uses less digits than its factorization.

21213522112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097888 (or 3097878 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The spelling of 21213522112 in words is "twenty-one billion, two hundred thirteen million, five hundred twenty-two thousand, one hundred twelve".