2102323221 has 32 divisors (see below), whose sum is σ = 3150576000. Its totient is φ = 1385403264.

The previous prime is 2102323177. The next prime is 2102323231. The reversal of 2102323221 is 1223232012.

2102323221 is a `hidden beast` number, since 210 + 232 + 3 + 221 = 666.

It is not a de Polignac number, because 2102323221 - 2¹⁴ = 2102306837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102323194 and 2102323203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102323231) 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 31 ways as a sum of consecutive naturals, for example, 2380446 + ... + 2381328.

It is an arithmetic number, because the mean of its divisors is an integer number (98455500).

Almost surely, 2^2102323221 is an apocalyptic number.

It is an amenable number.

2102323221 is a deficient number, since it is larger than the sum of its proper divisors (1048252779).

2102323221 is a wasteful number, since it uses less digits than its factorization.

2102323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2102323221 is about 45851.0983619804. The cubic root of 2102323221 is about 1281.0512240320.

Adding to 2102323221 its reverse (1223232012), we get a palindrome (3325555233).

It can be divided in two parts, 21023 and 23221, that added together give a palindrome (44244).

The spelling of 2102323221 in words is "two billion, one hundred two million, three hundred twenty-three thousand, two hundred twenty-one".