2399922121 has 3 divisors (see below), whose sum is σ = 2399971111. Its totient is φ = 2399873132.

The previous prime is 2399922017. The next prime is 2399922139. The reversal of 2399922121 is 1212299932.

The square root of 2399922121 is 48989.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 881721 + 2399040400 = 939^2 + 48980^2 .

It is not a de Polignac number, because 2399922121 - 2⁹ = 2399921609 is a prime.

It is a super-3 number, since 3×2399922121³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2399922221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 24495 + ... + 73483.

Almost surely, 2^2399922121 is an apocalyptic number.

2399922121 is the 48989-th square number.

2399922121 is the 24495-th centered octagonal number.

It is an amenable number.

2399922121 is a deficient number, since it is larger than the sum of its proper divisors (48990).

2399922121 is an frugal number, since it uses more digits than its factorization.

2399922121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97978 (or 48989 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The cubic root of 2399922121 is about 1338.8514181275.

The spelling of 2399922121 in words is "two billion, three hundred ninety-nine million, nine hundred twenty-two thousand, one hundred twenty-one".