921104131 has 2 divisors, whose sum is σ = 921104132. Its totient is φ = 921104130.

The previous prime is 921104123. The next prime is 921104137. The reversal of 921104131 is 131401129.

It is a strong prime.

It is an emirp because it is prime and its reverse (131401129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921104131 - 2³ = 921104123 is a prime.

It is a super-2 number, since 2×921104131² = 1696865640290530322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (921104137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460552065 + 460552066.

It is an arithmetic number, because the mean of its divisors is an integer number (460552066).

Almost surely, 2^921104131 is an apocalyptic number.

921104131 is a deficient number, since it is larger than the sum of its proper divisors (1).

921104131 is an equidigital number, since it uses as much as digits as its factorization.

921104131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 921104131 is about 30349.6973790514. The cubic root of 921104131 is about 972.9777523646.

The spelling of 921104131 in words is "nine hundred twenty-one million, one hundred four thousand, one hundred thirty-one".