123044220212021 has 2 divisors, whose sum is σ = 123044220212022. Its totient is φ = 123044220212020.

The previous prime is 123044220211963. The next prime is 123044220212041. The reversal of 123044220212021 is 120212022440321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77644735140625 + 45399485071396 = 8811625^2 + 6737914^2 .

It is a cyclic number.

It is not a de Polignac number, because 123044220212021 - 2³⁰ = 123043146470197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123044220212041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61522110106010 + 61522110106011.

It is an arithmetic number, because the mean of its divisors is an integer number (61522110106011).

Almost surely, 2^{123044220212021} is an apocalyptic number.

It is an amenable number.

123044220212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123044220212021 is an equidigital number, since it uses as much as digits as its factorization.

123044220212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 123044220212021 its reverse (120212022440321), we get a palindrome (243256242652342).

The spelling of 123044220212021 in words is "one hundred twenty-three trillion, forty-four billion, two hundred twenty million, two hundred twelve thousand, twenty-one".