21116152512 has 756 divisors, whose sum is σ = 80596999080. Its totient is φ = 5253341184.

The previous prime is 21116152487. The next prime is 21116152543. The reversal of 21116152512 is 21525161112.

It is a happy number.

21116152512 is a `hidden beast` number, since 2 + 1 + 11 + 615 + 25 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 90627148 + ... + 90627380.

Almost surely, 2^21116152512 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 21116152512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40298499540).

21116152512 is an abundant number, since it is smaller than the sum of its proper divisors (59480846568).

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

21116152512 is a wasteful number, since it uses less digits than its factorization.

21116152512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 277 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The spelling of 21116152512 in words is "twenty-one billion, one hundred sixteen million, one hundred fifty-two thousand, five hundred twelve".