123996963029161 has 2 divisors, whose sum is σ = 123996963029162. Its totient is φ = 123996963029160.

The previous prime is 123996963029143. The next prime is 123996963029201. The reversal of 123996963029161 is 161920369699321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121612813952400 + 2384149076761 = 11027820^2 + 1544069^2 .

It is a cyclic number.

It is not a de Polignac number, because 123996963029161 - 2²³ = 123996954640553 is a prime.

It is not a weakly prime, because it can be changed into another prime (123996963029141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61998481514580 + 61998481514581.

It is an arithmetic number, because the mean of its divisors is an integer number (61998481514581).

Almost surely, 2^{123996963029161} is an apocalyptic number.

It is an amenable number.

123996963029161 is a deficient number, since it is larger than the sum of its proper divisors (1).

123996963029161 is an equidigital number, since it uses as much as digits as its factorization.

123996963029161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51018336, while the sum is 67.

The spelling of 123996963029161 in words is "one hundred twenty-three trillion, nine hundred ninety-six billion, nine hundred sixty-three million, twenty-nine thousand, one hundred sixty-one".