123031081 has 2 divisors, whose sum is σ = 123031082. Its totient is φ = 123031080.

The previous prime is 123030959. The next prime is 123031087. The reversal of 123031081 is 180130321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96353856 + 26677225 = 9816^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 123031081 - 2⁷ = 123030953 is a prime.

It is a super-2 number, since 2×123031081² = 30273293784057122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123031087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515540 + 61515541.

It is an arithmetic number, because the mean of its divisors is an integer number (61515541).

Almost surely, 2^123031081 is an apocalyptic number.

It is an amenable number.

123031081 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031081 is an equidigital number, since it uses as much as digits as its factorization.

123031081 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 19.

The square root of 123031081 is about 11091.9376575962. The cubic root of 123031081 is about 497.3608691522.

The spelling of 123031081 in words is "one hundred twenty-three million, thirty-one thousand, eighty-one".