1031313131121 has 16 divisors (see below), whose sum is σ = 1692411292544. Its totient is φ = 543989343744.

The previous prime is 1031313131111. The next prime is 1031313131197. The reversal of 1031313131121 is 1211313131301.

It is not a de Polignac number, because 1031313131121 - 2⁹ = 1031313130609 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1031313131111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1888851616 + ... + 1888852161.

It is an arithmetic number, because the mean of its divisors is an integer number (105775705784).

Almost surely, 2^{1031313131121} is an apocalyptic number.

It is an amenable number.

1031313131121 is a deficient number, since it is larger than the sum of its proper divisors (661098161423).

1031313131121 is a wasteful number, since it uses less digits than its factorization.

1031313131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777703800.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 1031313131121 its reverse (1211313131301), we get a palindrome (2242626262422).

The spelling of 1031313131121 in words is "one trillion, thirty-one billion, three hundred thirteen million, one hundred thirty-one thousand, one hundred twenty-one".