123031012961 has 2 divisors, whose sum is σ = 123031012962. Its totient is φ = 123031012960.

The previous prime is 123031012931. The next prime is 123031013009. The reversal of 123031012961 is 169210130321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122863569361 + 167443600 = 350519^2 + 12940^2 .

It is an emirp because it is prime and its reverse (169210130321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123031012961 - 2¹⁰ = 123031011937 is a prime.

It is not a weakly prime, because it can be changed into another prime (123031012931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515506480 + 61515506481.

It is an arithmetic number, because the mean of its divisors is an integer number (61515506481).

Almost surely, 2^123031012961 is an apocalyptic number.

It is an amenable number.

123031012961 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031012961 is an equidigital number, since it uses as much as digits as its factorization.

123031012961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 123031012961 in words is "one hundred twenty-three billion, thirty-one million, twelve thousand, nine hundred sixty-one".