123121022122201 has 4 divisors (see below), whose sum is σ = 123121292650804. Its totient is φ = 123120751593600.

The previous prime is 123121022122181. The next prime is 123121022122229. The reversal of 123121022122201 is 102221220121321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86457936572176 + 36663085550025 = 9298276^2 + 6055005^2 .

It is a cyclic number.

It is not a de Polignac number, because 123121022122201 - 2⁹ = 123121022121689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121022128201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134580480 + ... + 135492241.

It is an arithmetic number, because the mean of its divisors is an integer number (30780323162701).

Almost surely, 2^{123121022122201} is an apocalyptic number.

It is an amenable number.

123121022122201 is a deficient number, since it is larger than the sum of its proper divisors (270528603).

123121022122201 is an equidigital number, since it uses as much as digits as its factorization.

123121022122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270528602.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 123121022122201 its reverse (102221220121321), we get a palindrome (225342242243522).

The spelling of 123121022122201 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, two hundred one".