1231042031 has 2 divisors, whose sum is σ = 1231042032. Its totient is φ = 1231042030.

The previous prime is 1231042027. The next prime is 1231042049. The reversal of 1231042031 is 1302401321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231042031 - 2² = 1231042027 is a prime.

It is a super-2 number, since 2×1231042031² = 3030928964177209922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231042061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615521015 + 615521016.

It is an arithmetic number, because the mean of its divisors is an integer number (615521016).

Almost surely, 2^1231042031 is an apocalyptic number.

1231042031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231042031 is an equidigital number, since it uses as much as digits as its factorization.

1231042031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231042031 is about 35086.2085583495. The cubic root of 1231042031 is about 1071.7437520434.

Adding to 1231042031 its reverse (1302401321), we get a palindrome (2533443352).

The spelling of 1231042031 in words is "one billion, two hundred thirty-one million, forty-two thousand, thirty-one".