1221034325313 has 16 divisors (see below), whose sum is σ = 1776143204352. Its totient is φ = 739981938000.

The previous prime is 1221034325309. The next prime is 1221034325351. The reversal of 1221034325313 is 3135234301221.

It is not a de Polignac number, because 1221034325313 - 2² = 1221034325309 is a prime.

It is a super-2 number, since 2×1221034325313² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221034325383) 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 15 ways as a sum of consecutive naturals, for example, 327393 + ... + 1596638.

It is an arithmetic number, because the mean of its divisors is an integer number (111008950272).

Almost surely, 2^{1221034325313} is an apocalyptic number.

It is an amenable number.

1221034325313 is a deficient number, since it is larger than the sum of its proper divisors (555108879039).

1221034325313 is a wasteful number, since it uses less digits than its factorization.

1221034325313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943276.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 1221034325313 its reverse (3135234301221), we get a palindrome (4356268626534).

The spelling of 1221034325313 in words is "one trillion, two hundred twenty-one billion, thirty-four million, three hundred twenty-five thousand, three hundred thirteen".