123201193961 has 2 divisors, whose sum is σ = 123201193962. Its totient is φ = 123201193960.

The previous prime is 123201193949. The next prime is 123201193979. The reversal of 123201193961 is 169391102321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115205257561 + 7995936400 = 339419^2 + 89420^2 .

It is a cyclic number.

It is not a de Polignac number, because 123201193961 - 2²² = 123196999657 is a prime.

It is not a weakly prime, because it can be changed into another prime (123201193931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600596980 + 61600596981.

It is an arithmetic number, because the mean of its divisors is an integer number (61600596981).

Almost surely, 2^123201193961 is an apocalyptic number.

It is an amenable number.

123201193961 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201193961 is an equidigital number, since it uses as much as digits as its factorization.

123201193961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 123201193961 in words is "one hundred twenty-three billion, two hundred one million, one hundred ninety-three thousand, nine hundred sixty-one".