2173292021 has 2 divisors, whose sum is σ = 2173292022. Its totient is φ = 2173292020.

The previous prime is 2173291997. The next prime is 2173292039. The reversal of 2173292021 is 1202923712.

2173292021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157602500 + 15689521 = 46450^2 + 3961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173292021 - 2¹⁰ = 2173290997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173292621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086646010 + 1086646011.

It is an arithmetic number, because the mean of its divisors is an integer number (1086646011).

Almost surely, 2^2173292021 is an apocalyptic number.

It is an amenable number.

2173292021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173292021 is an equidigital number, since it uses as much as digits as its factorization.

2173292021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2173292021 is about 46618.5802121858. The cubic root of 2173292021 is about 1295.3069483037.

The spelling of 2173292021 in words is "two billion, one hundred seventy-three million, two hundred ninety-two thousand, twenty-one".