21125452112 has 40 divisors (see below), whose sum is σ = 41897627904. Its totient is φ = 10313339904.

The previous prime is 21125452099. The next prime is 21125452121.

It is a happy number.

21125452112 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3452768 + ... + 3458880.

Almost surely, 2^21125452112 is an apocalyptic number.

It is an amenable number.

21125452112 is a deficient number, since it is larger than the sum of its proper divisors (20772175792).

21125452112 is a wasteful number, since it uses less digits than its factorization.

21125452112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11187 (or 11181 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The spelling of 21125452112 in words is "twenty-one billion, one hundred twenty-five million, four hundred fifty-two thousand, one hundred twelve".