121304831 has 2 divisors, whose sum is σ = 121304832. Its totient is φ = 121304830.

The previous prime is 121304819. The next prime is 121304839. The reversal of 121304831 is 138403121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121304831 is a prime.

It is a super-2 number, since 2×121304831² = 29429724047877122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121304797 and 121304806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121304839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60652415 + 60652416.

It is an arithmetic number, because the mean of its divisors is an integer number (60652416).

Almost surely, 2^121304831 is an apocalyptic number.

121304831 is a deficient number, since it is larger than the sum of its proper divisors (1).

121304831 is an equidigital number, since it uses as much as digits as its factorization.

121304831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 121304831 is about 11013.8472388171. The cubic root of 121304831 is about 495.0237460975.

Adding to 121304831 its reverse (138403121), we get a palindrome (259707952).

It can be divided in two parts, 12130 and 4831, that added together give a palindrome (16961).

The spelling of 121304831 in words is "one hundred twenty-one million, three hundred four thousand, eight hundred thirty-one".