121310323231 has 2 divisors, whose sum is σ = 121310323232. Its totient is φ = 121310323230.

The previous prime is 121310323187. The next prime is 121310323243. The reversal of 121310323231 is 132323013121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121310323231 - 2²⁷ = 121176105503 is a prime.

It is a super-2 number, since 2×121310323231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121310323261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655161615 + 60655161616.

It is an arithmetic number, because the mean of its divisors is an integer number (60655161616).

Almost surely, 2^121310323231 is an apocalyptic number.

121310323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

121310323231 is an equidigital number, since it uses as much as digits as its factorization.

121310323231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 121310323231 its reverse (132323013121), we get a palindrome (253633336352).

The spelling of 121310323231 in words is "one hundred twenty-one billion, three hundred ten million, three hundred twenty-three thousand, two hundred thirty-one".