1031031131123 has 4 divisors (see below), whose sum is σ = 1178321292720. Its totient is φ = 883740969528.

The previous prime is 1031031131113. The next prime is 1031031131131. The reversal of 1031031131123 is 3211311301301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1031031131123 - 2⁴ = 1031031131107 is a prime.

It is a super-2 number, since 2×1031031131123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031031131095 and 1031031131104.

It is not an unprimeable number, because it can be changed into a prime (1031031131113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73645080788 + ... + 73645080801.

It is an arithmetic number, because the mean of its divisors is an integer number (294580323180).

Almost surely, 2^{1031031131123} is an apocalyptic number.

1031031131123 is a deficient number, since it is larger than the sum of its proper divisors (147290161597).

1031031131123 is an equidigital number, since it uses as much as digits as its factorization.

1031031131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147290161596.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1031031131123 its reverse (3211311301301), we get a palindrome (4242342432424).

The spelling of 1031031131123 in words is "one trillion, thirty-one billion, thirty-one million, one hundred thirty-one thousand, one hundred twenty-three".