123330112131221 has 4 divisors (see below), whose sum is σ = 124551202350444. Its totient is φ = 122109021912000.

The previous prime is 123330112131211. The next prime is 123330112131283. The reversal of 123330112131221 is 122131211033321.

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 74592414156100 + 48737697975121 = 8636690^2 + 6981239^2 .

It is a cyclic number.

It is not a de Polignac number, because 123330112131221 - 2²⁶ = 123330045022357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123330112131211) 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, 610545109460 + ... + 610545109661.

It is an arithmetic number, because the mean of its divisors is an integer number (31137800587611).

Almost surely, 2^{123330112131221} is an apocalyptic number.

It is an amenable number.

123330112131221 is a deficient number, since it is larger than the sum of its proper divisors (1221090219223).

123330112131221 is a wasteful number, since it uses less digits than its factorization.

123330112131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221090219222.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 123330112131221 its reverse (122131211033321), we get a palindrome (245461323164542).

The spelling of 123330112131221 in words is "one hundred twenty-three trillion, three hundred thirty billion, one hundred twelve million, one hundred thirty-one thousand, two hundred twenty-one".