123031101911 has 2 divisors, whose sum is σ = 123031101912. Its totient is φ = 123031101910.

The previous prime is 123031101877. The next prime is 123031101961. The reversal of 123031101911 is 119101130321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123031101911 - 2⁶ = 123031101847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123031101961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515550955 + 61515550956.

It is an arithmetic number, because the mean of its divisors is an integer number (61515550956).

Almost surely, 2^123031101911 is an apocalyptic number.

123031101911 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031101911 is an equidigital number, since it uses as much as digits as its factorization.

123031101911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The spelling of 123031101911 in words is "one hundred twenty-three billion, thirty-one million, one hundred one thousand, nine hundred eleven".