123032110021 has 2 divisors, whose sum is σ = 123032110022. Its totient is φ = 123032110020.

The previous prime is 123032109989. The next prime is 123032110039. The reversal of 123032110021 is 120011230321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120926585025 + 2105524996 = 347745^2 + 45886^2 .

It is a cyclic number.

It is not a de Polignac number, because 123032110021 - 2⁵ = 123032109989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123032109977 and 123032110004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123032113021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61516055010 + 61516055011.

It is an arithmetic number, because the mean of its divisors is an integer number (61516055011).

Almost surely, 2^123032110021 is an apocalyptic number.

It is an amenable number.

123032110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123032110021 is an equidigital number, since it uses as much as digits as its factorization.

123032110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123032110021 its reverse (120011230321), we get a palindrome (243043340342).

The spelling of 123032110021 in words is "one hundred twenty-three billion, thirty-two million, one hundred ten thousand, twenty-one".