123340373721 has 6 divisors (see below), whose sum is σ = 178158317610. Its totient is φ = 82226915808.

The previous prime is 123340373699. The next prime is 123340373747. The reversal of 123340373721 is 127373043321.

It can be written as a sum of positive squares in only one way, i.e., 103594503321 + 19745870400 = 321861^2 + 140520^2 .

It is not a de Polignac number, because 123340373721 - 2⁷ = 123340373593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123340373521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6852242976 + ... + 6852242993.

It is an arithmetic number, because the mean of its divisors is an integer number (29693052935).

Almost surely, 2^123340373721 is an apocalyptic number.

It is an amenable number.

123340373721 is a deficient number, since it is larger than the sum of its proper divisors (54817943889).

123340373721 is a wasteful number, since it uses less digits than its factorization.

123340373721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704485975 (or 13704485972 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 36.

The spelling of 123340373721 in words is "one hundred twenty-three billion, three hundred forty million, three hundred seventy-three thousand, seven hundred twenty-one".