2102055221 has 8 divisors (see below), whose sum is σ = 2435258304. Its totient is φ = 1777079520.

The previous prime is 2102055203. The next prime is 2102055229. The reversal of 2102055221 is 1225502012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102055221 - 2⁶ = 2102055157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102055193 and 2102055202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102055229) 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 7 ways as a sum of consecutive naturals, for example, 2056295 + ... + 2057316.

It is an arithmetic number, because the mean of its divisors is an integer number (304407288).

Almost surely, 2^2102055221 is an apocalyptic number.

It is an amenable number.

2102055221 is a deficient number, since it is larger than the sum of its proper divisors (333203083).

2102055221 is an equidigital number, since it uses as much as digits as its factorization.

2102055221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113691.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2102055221 is about 45848.1757652363. The cubic root of 2102055221 is about 1280.9967864279.

Adding to 2102055221 its reverse (1225502012), we get a palindrome (3327557233).

The spelling of 2102055221 in words is "two billion, one hundred two million, fifty-five thousand, two hundred twenty-one".