123012204433021 has 2 divisors, whose sum is σ = 123012204433022. Its totient is φ = 123012204433020.

The previous prime is 123012204432983. The next prime is 123012204433039. The reversal of 123012204433021 is 120334402210321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122795431316100 + 216773116921 = 11081310^2 + 465589^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012204433021 - 2⁷ = 123012204432893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012204403021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506102216510 + 61506102216511.

It is an arithmetic number, because the mean of its divisors is an integer number (61506102216511).

Almost surely, 2^{123012204433021} is an apocalyptic number.

It is an amenable number.

123012204433021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012204433021 is an equidigital number, since it uses as much as digits as its factorization.

123012204433021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 123012204433021 its reverse (120334402210321), we get a palindrome (243346606643342).

The spelling of 123012204433021 in words is "one hundred twenty-three trillion, twelve billion, two hundred four million, four hundred thirty-three thousand, twenty-one".