921957121 has 8 divisors (see below), whose sum is σ = 971730080. Its totient is φ = 872309088.

The previous prime is 921957061. The next prime is 921957131. The reversal of 921957121 is 121759129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 921957121 - 2⁷ = 921956993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921957131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15876 + ... + 45781.

It is an arithmetic number, because the mean of its divisors is an integer number (121466260).

Almost surely, 2^921957121 is an apocalyptic number.

It is an amenable number.

921957121 is a deficient number, since it is larger than the sum of its proper divisors (49772959).

921957121 is a wasteful number, since it uses less digits than its factorization.

921957121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62463.

The product of its digits is 11340, while the sum is 37.

The square root of 921957121 is about 30363.7468208388. The cubic root of 921957121 is about 973.2780022523.

The spelling of 921957121 in words is "nine hundred twenty-one million, nine hundred fifty-seven thousand, one hundred twenty-one".