1231123330031 has 12 divisors (see below), whose sum is σ = 1465428247272. Its totient is φ = 1030707902448.

The previous prime is 1231123329991. The next prime is 1231123330043. The reversal of 1231123330031 is 1300333211321.

It is not a de Polignac number, because 1231123330031 - 2¹⁴ = 1231123313647 is a prime.

It is a super-2 number, since 2×1231123330031² (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 = 1231123329979 and 1231123330006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231123330631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 292148660 + ... + 292152873.

It is an arithmetic number, because the mean of its divisors is an integer number (122119020606).

Almost surely, 2^{1231123330031} is an apocalyptic number.

1231123330031 is a deficient number, since it is larger than the sum of its proper divisors (234304917241).

1231123330031 is an equidigital number, since it uses as much as digits as its factorization.

1231123330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584301590 (or 584301583 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1231123330031 its reverse (1300333211321), we get a palindrome (2531456541352).

The spelling of 1231123330031 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-three million, three hundred thirty thousand, thirty-one".