2220121210 has 8 divisors (see below), whose sum is σ = 3996218196. Its totient is φ = 888048480.

The previous prime is 2220121201. The next prime is 2220121219. The reversal of 2220121210 is 121210222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2220121201) and next prime (2220121219).

It can be written as a sum of positive squares in 2 ways, for example, as 2069249121 + 150872089 = 45489^2 + 12283^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2220121219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111006051 + ... + 111006070.

Almost surely, 2^2220121210 is an apocalyptic number.

2220121210 is a deficient number, since it is larger than the sum of its proper divisors (1776096986).

2220121210 is a wasteful number, since it uses less digits than its factorization.

2220121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222012128.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2220121210 is about 47118.1622094920. The cubic root of 2220121210 is about 1304.5444914743.

Adding to 2220121210 its reverse (121210222), we get a palindrome (2341331432).

The spelling of 2220121210 in words is "two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred ten".