921112816 has 20 divisors (see below), whose sum is σ = 1921937752. Its totient is φ = 425128896.

The previous prime is 921112813. The next prime is 921112823. The reversal of 921112816 is 618211129.

It is a happy number.

921112816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921112813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214006 + ... + 2214421.

Almost surely, 2^921112816 is an apocalyptic number.

It is an amenable number.

921112816 is an abundant number, since it is smaller than the sum of its proper divisors (1000824936).

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

921112816 is a wasteful number, since it uses less digits than its factorization.

921112816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428448 (or 4428442 counting only the distinct ones).

The product of its digits is 1728, while the sum is 31.

The square root of 921112816 is about 30349.8404608657. The cubic root of 921112816 is about 972.9808103921.

The spelling of 921112816 in words is "nine hundred twenty-one million, one hundred twelve thousand, eight hundred sixteen".