12021525712 has 120 divisors (see below), whose sum is σ = 27971650176. Its totient is φ = 4901472000.

The previous prime is 12021525629. The next prime is 12021525751. The reversal of 12021525712 is 21752512021.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6564637 + ... + 6566467.

Almost surely, 2^12021525712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021525712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13985825088).

12021525712 is an abundant number, since it is smaller than the sum of its proper divisors (15950124464).

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

12021525712 is a wasteful number, since it uses less digits than its factorization.

12021525712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The spelling of 12021525712 in words is "twelve billion, twenty-one million, five hundred twenty-five thousand, seven hundred twelve".