2100221222 has 32 divisors (see below), whose sum is σ = 3521954304. Its totient is φ = 931039200.

The previous prime is 2100221153. The next prime is 2100221231. The reversal of 2100221222 is 2221220012.

It is a junction number, because it is equal to n+sod(n) for n = 2100221197 and 2100221206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860588 + ... + 863024.

It is an arithmetic number, because the mean of its divisors is an integer number (110061072).

Almost surely, 2^2100221222 is an apocalyptic number.

2100221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2100221222 is a deficient number, since it is larger than the sum of its proper divisors (1421733082).

2100221222 is a wasteful number, since it uses less digits than its factorization.

2100221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2100221222 is about 45828.1706158996. The cubic root of 2100221222 is about 1280.6241304378.

Adding to 2100221222 its reverse (2221220012), we get a palindrome (4321441234).

It can be divided in two parts, 21002 and 21222, that added together give a palindrome (42224).

The spelling of 2100221222 in words is "two billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-two".