1231223110131 has 32 divisors (see below), whose sum is σ = 1889469255168. Its totient is φ = 698577788160.

The previous prime is 1231223110109. The next prime is 1231223110153. The reversal of 1231223110131 is 1310113221321.

It is an interprime number because it is at equal distance from previous prime (1231223110109) and next prime (1231223110153).

It is not a de Polignac number, because 1231223110131 - 2⁹ = 1231223109619 is a prime.

It is a super-2 number, since 2×1231223110131² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1231223110098 and 1231223110107.

It is not an unprimeable number, because it can be changed into a prime (1231223118131) 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, 1431871 + ... + 2124311.

It is an arithmetic number, because the mean of its divisors is an integer number (59045914224).

Almost surely, 2^{1231223110131} is an apocalyptic number.

1231223110131 is a deficient number, since it is larger than the sum of its proper divisors (658246145037).

1231223110131 is a wasteful number, since it uses less digits than its factorization.

1231223110131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693051.

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

Adding to 1231223110131 its reverse (1310113221321), we get a palindrome (2541336331452).

The spelling of 1231223110131 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-three million, one hundred ten thousand, one hundred thirty-one".