2102052221 has 4 divisors (see below), whose sum is σ = 2107540992. Its totient is φ = 2096563452.

The previous prime is 2102052209. The next prime is 2102052233. The reversal of 2102052221 is 1222502012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2102052209) and next prime (2102052233).

It is a cyclic number.

It is not a de Polignac number, because 2102052221 - 2³⁰ = 1028310397 is a prime.

It is a super-2 number, since 2×2102052221² = 8837247079622065682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102052221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102052521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743811 + ... + 2744576.

It is an arithmetic number, because the mean of its divisors is an integer number (526885248).

Almost surely, 2^2102052221 is an apocalyptic number.

It is an amenable number.

2102052221 is a deficient number, since it is larger than the sum of its proper divisors (5488771).

2102052221 is an equidigital number, since it uses as much as digits as its factorization.

2102052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488770.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2102052221 is about 45848.1430485467. The cubic root of 2102052221 is about 1280.9961770255.

Adding to 2102052221 its reverse (1222502012), we get a palindrome (3324554233).

The spelling of 2102052221 in words is "two billion, one hundred two million, fifty-two thousand, two hundred twenty-one".