2102221121 has 16 divisors (see below), whose sum is σ = 2822563968. Its totient is φ = 1512086400.

The previous prime is 2102221117. The next prime is 2102221129. The reversal of 2102221121 is 1211222012.

It is not a de Polignac number, because 2102221121 - 2² = 2102221117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102221096 and 2102221105.

It is not an unprimeable number, because it can be changed into a prime (2102221129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1049060 + ... + 1051061.

It is an arithmetic number, because the mean of its divisors is an integer number (176410248).

Almost surely, 2^2102221121 is an apocalyptic number.

It is an amenable number.

2102221121 is a deficient number, since it is larger than the sum of its proper divisors (720342847).

2102221121 is a wasteful number, since it uses less digits than its factorization.

2102221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100152.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2102221121 is about 45849.9849618296. The cubic root of 2102221121 is about 1281.0304854754.

Adding to 2102221121 its reverse (1211222012), we get a palindrome (3313443133).

The spelling of 2102221121 in words is "two billion, one hundred two million, two hundred twenty-one thousand, one hundred twenty-one".