1231101211113 has 6 divisors (see below), whose sum is σ = 1778257304954. Its totient is φ = 820734140736.

The previous prime is 1231101211073. The next prime is 1231101211127. The reversal of 1231101211113 is 3111121011321.

It can be written as a sum of positive squares in only one way, i.e., 1038833869824 + 192267341289 = 1019232^2 + 438483^2 .

It is not a de Polignac number, because 1231101211113 - 2⁹ = 1231101210601 is a prime.

It is a super-2 number, since 2×1231101211113² (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 (1231101111113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68394511720 + ... + 68394511737.

Almost surely, 2^{1231101211113} is an apocalyptic number.

It is an amenable number.

1231101211113 is a deficient number, since it is larger than the sum of its proper divisors (547156093841).

1231101211113 is a wasteful number, since it uses less digits than its factorization.

1231101211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136789023463 (or 136789023460 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1231101211113 its reverse (3111121011321), we get a palindrome (4342222222434).

The spelling of 1231101211113 in words is "one trillion, two hundred thirty-one billion, one hundred one million, two hundred eleven thousand, one hundred thirteen".