2102299021 has 4 divisors (see below), whose sum is σ = 2102690844. Its totient is φ = 2101907200.

The previous prime is 2102298959. The next prime is 2102299027. The reversal of 2102299021 is 1209922012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 525097225 + 1577201796 = 22915^2 + 39714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102299021 - 2²⁵ = 2068744589 is a prime.

It is a super-2 number, since 2×2102299021² = 8839322347395116882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102299027) 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 in 3 ways as a sum of consecutive naturals, for example, 187750 + ... + 198631.

It is an arithmetic number, because the mean of its divisors is an integer number (525672711).

Almost surely, 2^2102299021 is an apocalyptic number.

It is an amenable number.

2102299021 is a deficient number, since it is larger than the sum of its proper divisors (391823).

2102299021 is an equidigital number, since it uses as much as digits as its factorization.

2102299021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391822.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 2102299021 is about 45850.8344635079. The cubic root of 2102299021 is about 1281.0463085876.

The spelling of 2102299021 in words is "two billion, one hundred two million, two hundred ninety-nine thousand, twenty-one".