121131231313 has 2 divisors, whose sum is σ = 121131231314. Its totient is φ = 121131231312.

The previous prime is 121131231311. The next prime is 121131231391. The reversal of 121131231313 is 313132131121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86770306624 + 34360924689 = 294568^2 + 185367^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131231313 - 2¹ = 121131231311 is a prime.

Together with 121131231311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121131231311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565615656 + 60565615657.

It is an arithmetic number, because the mean of its divisors is an integer number (60565615657).

Almost surely, 2^121131231313 is an apocalyptic number.

It is an amenable number.

121131231313 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131231313 is an equidigital number, since it uses as much as digits as its factorization.

121131231313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

Adding to 121131231313 its reverse (313132131121), we get a palindrome (434263362434).

The spelling of 121131231313 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred thirteen".