123299314921 has 2 divisors, whose sum is σ = 123299314922. Its totient is φ = 123299314920.

The previous prime is 123299314891. The next prime is 123299314927. The reversal of 123299314921 is 129413992321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97087704921 + 26211610000 = 311589^2 + 161900^2 .

It is a cyclic number.

It is not a de Polignac number, because 123299314921 - 2³³ = 114709380329 is a prime.

It is a super-3 number, since 3×123299314921³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (123299314927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61649657460 + 61649657461.

It is an arithmetic number, because the mean of its divisors is an integer number (61649657461).

Almost surely, 2^123299314921 is an apocalyptic number.

It is an amenable number.

123299314921 is a deficient number, since it is larger than the sum of its proper divisors (1).

123299314921 is an equidigital number, since it uses as much as digits as its factorization.

123299314921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 46.

The spelling of 123299314921 in words is "one hundred twenty-three billion, two hundred ninety-nine million, three hundred fourteen thousand, nine hundred twenty-one".