121804931 has 2 divisors, whose sum is σ = 121804932. Its totient is φ = 121804930.

The previous prime is 121804927. The next prime is 121804951. The reversal of 121804931 is 139408121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121804931 - 2² = 121804927 is a prime.

It is a super-2 number, since 2×121804931² = 29672882431829522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121804894 and 121804903.

It is not a weakly prime, because it can be changed into another prime (121804951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60902465 + 60902466.

It is an arithmetic number, because the mean of its divisors is an integer number (60902466).

Almost surely, 2^121804931 is an apocalyptic number.

121804931 is a deficient number, since it is larger than the sum of its proper divisors (1).

121804931 is an equidigital number, since it uses as much as digits as its factorization.

121804931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 121804931 is about 11036.5271258671. The cubic root of 121804931 is about 495.7030868561.

The spelling of 121804931 in words is "one hundred twenty-one million, eight hundred four thousand, nine hundred thirty-one".