121573931 has 2 divisors, whose sum is σ = 121573932. Its totient is φ = 121573930.

The previous prime is 121573927. The next prime is 121573957. The reversal of 121573931 is 139375121.

It is a weak prime.

It is an emirp because it is prime and its reverse (139375121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121573931 - 2² = 121573927 is a prime.

It is a super-2 number, since 2×121573931² = 29560441397585522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121573031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60786965 + 60786966.

It is an arithmetic number, because the mean of its divisors is an integer number (60786966).

Almost surely, 2^121573931 is an apocalyptic number.

121573931 is a deficient number, since it is larger than the sum of its proper divisors (1).

121573931 is an equidigital number, since it uses as much as digits as its factorization.

121573931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 32.

The square root of 121573931 is about 11026.0569107909. The cubic root of 121573931 is about 495.3895257238.

The spelling of 121573931 in words is "one hundred twenty-one million, five hundred seventy-three thousand, nine hundred thirty-one".