1231120112313 has 32 divisors (see below), whose sum is σ = 2074902382336. Its totient is φ = 631831166208.

The previous prime is 1231120112311. The next prime is 1231120112317. The reversal of 1231120112313 is 3132110211321.

It is not a de Polignac number, because 1231120112313 - 2¹ = 1231120112311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1231120112313.

It is not an unprimeable number, because it can be changed into a prime (1231120112311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60930406 + ... + 60950607.

It is an arithmetic number, because the mean of its divisors is an integer number (64840699448).

Almost surely, 2^{1231120112313} is an apocalyptic number.

1231120112313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231120112313 is a deficient number, since it is larger than the sum of its proper divisors (843782270023).

1231120112313 is a wasteful number, since it uses less digits than its factorization.

1231120112313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121881073.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1231120112313 its reverse (3132110211321), we get a palindrome (4363230323634).

The spelling of 1231120112313 in words is "one trillion, two hundred thirty-one billion, one hundred twenty million, one hundred twelve thousand, three hundred thirteen".