123302432201621 has 2 divisors, whose sum is σ = 123302432201622. Its totient is φ = 123302432201620.

The previous prime is 123302432201603. The next prime is 123302432201687. The reversal of 123302432201621 is 126102234203321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118384301007025 + 4918131194596 = 10880455^2 + 2217686^2 .

It is a cyclic number.

It is not a de Polignac number, because 123302432201621 - 2²⁶ = 123302365092757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123302432201821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61651216100810 + 61651216100811.

It is an arithmetic number, because the mean of its divisors is an integer number (61651216100811).

Almost surely, 2^{123302432201621} is an apocalyptic number.

It is an amenable number.

123302432201621 is a deficient number, since it is larger than the sum of its proper divisors (1).

123302432201621 is an equidigital number, since it uses as much as digits as its factorization.

123302432201621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 123302432201621 its reverse (126102234203321), we get a palindrome (249404666404942).

The spelling of 123302432201621 in words is "one hundred twenty-three trillion, three hundred two billion, four hundred thirty-two million, two hundred one thousand, six hundred twenty-one".