1231013031 has 4 divisors (see below), whose sum is σ = 1641350712. Its totient is φ = 820675352.

The previous prime is 1231013011. The next prime is 1231013093. The reversal of 1231013031 is 1303101321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1303101321 = 3 ⋅434367107.

It is a cyclic number.

It is not a de Polignac number, because 1231013031 - 2⁵ = 1231012999 is a prime.

It is a super-2 number, since 2×1231013031² = 3030786164983613922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231013031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231013011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205168836 + ... + 205168841.

It is an arithmetic number, because the mean of its divisors is an integer number (410337678).

Almost surely, 2^1231013031 is an apocalyptic number.

1231013031 is a deficient number, since it is larger than the sum of its proper divisors (410337681).

1231013031 is an equidigital number, since it uses as much as digits as its factorization.

1231013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410337680.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1231013031 is about 35085.7952881219. The cubic root of 1231013031 is about 1071.7353361886.

Adding to 1231013031 its reverse (1303101321), we get a palindrome (2534114352).

The spelling of 1231013031 in words is "one billion, two hundred thirty-one million, thirteen thousand, thirty-one".