911312921 has 16 divisors (see below), whose sum is σ = 953694720. Its totient is φ = 869823360.

The previous prime is 911312911. The next prime is 911312933. The reversal of 911312921 is 129213119.

It is a cyclic number.

It is not a de Polignac number, because 911312921 - 2¹⁰ = 911311897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (911312911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955781 + ... + 956733.

It is an arithmetic number, because the mean of its divisors is an integer number (59605920).

Almost surely, 2^911312921 is an apocalyptic number.

It is an amenable number.

911312921 is a deficient number, since it is larger than the sum of its proper divisors (42381799).

911312921 is a wasteful number, since it uses less digits than its factorization.

911312921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376.

The product of its digits is 972, while the sum is 29.

The square root of 911312921 is about 30187.9598681329. The cubic root of 911312921 is about 969.5179242699.

The spelling of 911312921 in words is "nine hundred eleven million, three hundred twelve thousand, nine hundred twenty-one".