2199874921 has 2 divisors, whose sum is σ = 2199874922. Its totient is φ = 2199874920.

The previous prime is 2199874913. The next prime is 2199874961. The reversal of 2199874921 is 1294789912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141088400 + 1058786521 = 33780^2 + 32539^2 .

It is a cyclic number.

It is not a de Polignac number, because 2199874921 - 2³ = 2199874913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2199874961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099937460 + 1099937461.

It is an arithmetic number, because the mean of its divisors is an integer number (1099937461).

Almost surely, 2^2199874921 is an apocalyptic number.

It is an amenable number.

2199874921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199874921 is an equidigital number, since it uses as much as digits as its factorization.

2199874921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 52.

The square root of 2199874921 is about 46902.8242326622. The cubic root of 2199874921 is about 1300.5667984028.

The spelling of 2199874921 in words is "two billion, one hundred ninety-nine million, eight hundred seventy-four thousand, nine hundred twenty-one".