921111045 has 32 divisors (see below), whose sum is σ = 1503774720. Its totient is φ = 481346880.

The previous prime is 921110999. The next prime is 921111073. The reversal of 921111045 is 540111129.

It is a happy number.

It is not a de Polignac number, because 921111045 - 2¹⁷ = 920979973 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175266 + ... + 180444.

It is an arithmetic number, because the mean of its divisors is an integer number (46992960).

Almost surely, 2^921111045 is an apocalyptic number.

It is an amenable number.

921111045 is a deficient number, since it is larger than the sum of its proper divisors (582663675).

921111045 is a wasteful number, since it uses less digits than its factorization.

921111045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 921111045 is about 30349.8112844215. The cubic root of 921111045 is about 972.9801868166.

The spelling of 921111045 in words is "nine hundred twenty-one million, one hundred eleven thousand, forty-five".