1221131113313 has 8 divisors (see below), whose sum is σ = 1221887049600. Its totient is φ = 1220375411568.

The previous prime is 1221131113289. The next prime is 1221131113351. The reversal of 1221131113313 is 3133111311221.

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 1221131113313 - 2²⁴ = 1221114336097 is a prime.

It is a super-2 number, since 2×1221131113313² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221131113393) 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, 10992395 + ... + 11102927.

It is an arithmetic number, because the mean of its divisors is an integer number (152735881200).

Almost surely, 2^{1221131113313} is an apocalyptic number.

It is an amenable number.

1221131113313 is a deficient number, since it is larger than the sum of its proper divisors (755936287).

1221131113313 is a wasteful number, since it uses less digits than its factorization.

1221131113313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117271.

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

Adding to 1221131113313 its reverse (3133111311221), we get a palindrome (4354242424534).

The spelling of 1221131113313 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one million, one hundred thirteen thousand, three hundred thirteen".