121312332013 has 2 divisors, whose sum is σ = 121312332014. Its totient is φ = 121312332012.

The previous prime is 121312331971. The next prime is 121312332019. The reversal of 121312332013 is 310233213121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121283634564 + 28697449 = 348258^2 + 5357^2 .

It is a cyclic number.

It is not a de Polignac number, because 121312332013 - 2⁹ = 121312331501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121312332019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656166006 + 60656166007.

It is an arithmetic number, because the mean of its divisors is an integer number (60656166007).

Almost surely, 2^121312332013 is an apocalyptic number.

It is an amenable number.

121312332013 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312332013 is an equidigital number, since it uses as much as digits as its factorization.

121312332013 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 121312332013 its reverse (310233213121), we get a palindrome (431545545134).

The spelling of 121312332013 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred thirty-two thousand, thirteen".