123001031 has 2 divisors, whose sum is σ = 123001032. Its totient is φ = 123001030.

The previous prime is 123000989. The next prime is 123001037. The reversal of 123001031 is 130100321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123001031 is a prime.

It is a super-2 number, since 2×123001031² = 30258507254125922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123001037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500515 + 61500516.

It is an arithmetic number, because the mean of its divisors is an integer number (61500516).

Almost surely, 2^123001031 is an apocalyptic number.

123001031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123001031 is an equidigital number, since it uses as much as digits as its factorization.

123001031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 123001031 is about 11090.5829873817. The cubic root of 123001031 is about 497.3203728511.

Adding to 123001031 its reverse (130100321), we get a palindrome (253101352).

It can be divided in two parts, 12300 and 1031, that added together give a palindrome (13331).

The spelling of 123001031 in words is "one hundred twenty-three million, one thousand, thirty-one".