123104354012021 has 2 divisors, whose sum is σ = 123104354012022. Its totient is φ = 123104354012020.

The previous prime is 123104354012009. The next prime is 123104354012063. The reversal of 123104354012021 is 120210453401321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102009495000625 + 21094859011396 = 10099975^2 + 4592914^2 .

It is a cyclic number.

It is not a de Polignac number, because 123104354012021 - 2⁶ = 123104354011957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123104354012071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61552177006010 + 61552177006011.

It is an arithmetic number, because the mean of its divisors is an integer number (61552177006011).

Almost surely, 2^{123104354012021} is an apocalyptic number.

It is an amenable number.

123104354012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123104354012021 is an equidigital number, since it uses as much as digits as its factorization.

123104354012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 123104354012021 in words is "one hundred twenty-three trillion, one hundred four billion, three hundred fifty-four million, twelve thousand, twenty-one".