1313311131221 has 8 divisors (see below), whose sum is σ = 1331564080704. Its totient is φ = 1295163996480.

The previous prime is 1313311131211. The next prime is 1313311131239. The reversal of 1313311131221 is 1221311133131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313311131221 - 2²² = 1313306936917 is a prime.

It is a super-2 number, since 2×1313311131221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313311131211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26428691 + ... + 26478336.

It is an arithmetic number, because the mean of its divisors is an integer number (166445510088).

Almost surely, 2^{1313311131221} is an apocalyptic number.

It is an amenable number.

1313311131221 is a deficient number, since it is larger than the sum of its proper divisors (18252949483).

1313311131221 is a wasteful number, since it uses less digits than its factorization.

1313311131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52907371.

The product of its digits is 324, while the sum is 23.

Adding to 1313311131221 its reverse (1221311133131), we get a palindrome (2534622264352).

The spelling of 1313311131221 in words is "one trillion, three hundred thirteen billion, three hundred eleven million, one hundred thirty-one thousand, two hundred twenty-one".