2102104221 has 16 divisors (see below), whose sum is σ = 3221107200. Its totient is φ = 1194489648.

The previous prime is 2102104201. The next prime is 2102104267. The reversal of 2102104221 is 1224012012.

It is not a de Polignac number, because 2102104221 - 2⁵ = 2102104189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102104221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102104201) 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 15 ways as a sum of consecutive naturals, for example, 275851 + ... + 283368.

It is an arithmetic number, because the mean of its divisors is an integer number (201319200).

Almost surely, 2^2102104221 is an apocalyptic number.

2102104221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2102104221 is a deficient number, since it is larger than the sum of its proper divisors (1119002979).

2102104221 is a wasteful number, since it uses less digits than its factorization.

2102104221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559408.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2102104221 is about 45848.7101345283. The cubic root of 2102104221 is about 1281.0067399175.

Adding to 2102104221 its reverse (1224012012), we get a palindrome (3326116233).

The spelling of 2102104221 in words is "two billion, one hundred two million, one hundred four thousand, two hundred twenty-one".