121213031313 has 32 divisors (see below), whose sum is σ = 185658278400. Its totient is φ = 69570144000.

The previous prime is 121213031297. The next prime is 121213031339. The reversal of 121213031313 is 313130312121.

It is a happy number.

It is not a de Polignac number, because 121213031313 - 2⁴ = 121213031297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121213031313.

It is not an unprimeable number, because it can be changed into a prime (121213031813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1721718 + ... + 1790736.

It is an arithmetic number, because the mean of its divisors is an integer number (5801821200).

Almost surely, 2^121213031313 is an apocalyptic number.

It is an amenable number.

121213031313 is a deficient number, since it is larger than the sum of its proper divisors (64445247087).

121213031313 is a wasteful number, since it uses less digits than its factorization.

121213031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71853.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 121213031313 its reverse (313130312121), we get a palindrome (434343343434).

The spelling of 121213031313 in words is "one hundred twenty-one billion, two hundred thirteen million, thirty-one thousand, three hundred thirteen".