123031135061 has 2 divisors, whose sum is σ = 123031135062. Its totient is φ = 123031135060.

The previous prime is 123031134991. The next prime is 123031135067. The reversal of 123031135061 is 160531130321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98019712561 + 25011422500 = 313081^2 + 158150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123031135061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123031135061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123031135067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515567530 + 61515567531.

It is an arithmetic number, because the mean of its divisors is an integer number (61515567531).

Almost surely, 2^123031135061 is an apocalyptic number.

It is an amenable number.

123031135061 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031135061 is an equidigital number, since it uses as much as digits as its factorization.

123031135061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 123031135061 its reverse (160531130321), we get a palindrome (283562265382).

The spelling of 123031135061 in words is "one hundred twenty-three billion, thirty-one million, one hundred thirty-five thousand, sixty-one".