1221119372913 has 16 divisors (see below), whose sum is σ = 1776193047552. Its totient is φ = 740064258000.

The previous prime is 1221119372887. The next prime is 1221119372947. The reversal of 1221119372913 is 3192739111221.

It is not a de Polignac number, because 1221119372913 - 2⁸ = 1221119372657 is a prime.

It is a super-2 number, since 2×1221119372913² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221119372413) 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 in 15 ways as a sum of consecutive naturals, for example, 4482108 + ... + 4746738.

It is an arithmetic number, because the mean of its divisors is an integer number (111012065472).

Almost surely, 2^{1221119372913} is an apocalyptic number.

It is an amenable number.

1221119372913 is a deficient number, since it is larger than the sum of its proper divisors (555073674639).

1221119372913 is a wasteful number, since it uses less digits than its factorization.

1221119372913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404476.

The product of its digits is 40824, while the sum is 42.

The spelling of 1221119372913 in words is "one trillion, two hundred twenty-one billion, one hundred nineteen million, three hundred seventy-two thousand, nine hundred thirteen".