2199974921 has 2 divisors, whose sum is σ = 2199974922. Its totient is φ = 2199974920.

The previous prime is 2199974893. The next prime is 2199974927. The reversal of 2199974921 is 1294799912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2184253696 + 15721225 = 46736^2 + 3965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2199974921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2199974927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099987460 + 1099987461.

It is an arithmetic number, because the mean of its divisors is an integer number (1099987461).

Almost surely, 2^2199974921 is an apocalyptic number.

It is an amenable number.

2199974921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199974921 is an equidigital number, since it uses as much as digits as its factorization.

2199974921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The square root of 2199974921 is about 46903.8902544341. The cubic root of 2199974921 is about 1300.5865047822.

The spelling of 2199974921 in words is "two billion, one hundred ninety-nine million, nine hundred seventy-four thousand, nine hundred twenty-one".