123012041081 has 2 divisors, whose sum is σ = 123012041082. Its totient is φ = 123012041080.

The previous prime is 123012041041. The next prime is 123012041161. The reversal of 123012041081 is 180140210321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93324751081 + 29687290000 = 305491^2 + 172300^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012041081 - 2⁶ = 123012041017 is a prime.

It is a super-2 number, since 2×123012041081² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123012041041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506020540 + 61506020541.

It is an arithmetic number, because the mean of its divisors is an integer number (61506020541).

Almost surely, 2^123012041081 is an apocalyptic number.

It is an amenable number.

123012041081 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012041081 is an equidigital number, since it uses as much as digits as its factorization.

123012041081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The spelling of 123012041081 in words is "one hundred twenty-three billion, twelve million, forty-one thousand, eighty-one".