123393221951 has 2 divisors, whose sum is σ = 123393221952. Its totient is φ = 123393221950.

The previous prime is 123393221929. The next prime is 123393221999. The reversal of 123393221951 is 159122393321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123393221951 - 2²⁶ = 123326113087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123393221899 and 123393221908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123393221351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61696610975 + 61696610976.

It is an arithmetic number, because the mean of its divisors is an integer number (61696610976).

Almost surely, 2^123393221951 is an apocalyptic number.

123393221951 is a deficient number, since it is larger than the sum of its proper divisors (1).

123393221951 is an equidigital number, since it uses as much as digits as its factorization.

123393221951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 41.

The spelling of 123393221951 in words is "one hundred twenty-three billion, three hundred ninety-three million, two hundred twenty-one thousand, nine hundred fifty-one".