123189767981321 has 8 divisors (see below), whose sum is σ = 126122820885600. Its totient is φ = 120324889578516.

The previous prime is 123189767981299. The next prime is 123189767981333.

123189767981321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 123189767981321 - 2³⁰ = 123188694239497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123189767981821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774630695 + ... + 774789708.

It is an arithmetic number, because the mean of its divisors is an integer number (15765352610700).

Almost surely, 2^{123189767981321} is an apocalyptic number.

It is an amenable number.

123189767981321 is a deficient number, since it is larger than the sum of its proper divisors (2933052904279).

123189767981321 is an frugal number, since it uses more digits than its factorization.

123189767981321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549420532 (or 1549420446 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 68.

The spelling of 123189767981321 in words is "one hundred twenty-three trillion, one hundred eighty-nine billion, seven hundred sixty-seven million, nine hundred eighty-one thousand, three hundred twenty-one".