121313403231389 has 2 divisors, whose sum is σ = 121313403231390. Its totient is φ = 121313403231388.

The previous prime is 121313403231347. The next prime is 121313403231421. The reversal of 121313403231389 is 983132304313121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74764850208889 + 46548553022500 = 8646667^2 + 6822650^2 .

It is a cyclic number.

It is not a de Polignac number, because 121313403231389 - 2²⁰ = 121313402182813 is a prime.

It is a super-3 number, since 3×121313403231389³ (a number of 43 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121313403231989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656701615694 + 60656701615695.

It is an arithmetic number, because the mean of its divisors is an integer number (60656701615695).

Almost surely, 2^{121313403231389} is an apocalyptic number.

It is an amenable number.

121313403231389 is a deficient number, since it is larger than the sum of its proper divisors (1).

121313403231389 is an equidigital number, since it uses as much as digits as its factorization.

121313403231389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 121313403231389 in words is "one hundred twenty-one trillion, three hundred thirteen billion, four hundred three million, two hundred thirty-one thousand, three hundred eighty-nine".