123321018937 has 2 divisors, whose sum is σ = 123321018938. Its totient is φ = 123321018936.

The previous prime is 123321018893. The next prime is 123321018943. The reversal of 123321018937 is 739810123321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117276111936 + 6044907001 = 342456^2 + 77749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123321018937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123321018937.

It is not a weakly prime, because it can be changed into another prime (123321018437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660509468 + 61660509469.

It is an arithmetic number, because the mean of its divisors is an integer number (61660509469).

Almost surely, 2^123321018937 is an apocalyptic number.

It is an amenable number.

123321018937 is a deficient number, since it is larger than the sum of its proper divisors (1).

123321018937 is an equidigital number, since it uses as much as digits as its factorization.

123321018937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 123321018937 in words is "one hundred twenty-three billion, three hundred twenty-one million, eighteen thousand, nine hundred thirty-seven".