2221112100 has 36 divisors (see below), whose sum is σ = 6426418544. Its totient is φ = 592296480.

The previous prime is 2221112083. The next prime is 2221112119. The reversal of 2221112100 is 12111222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3701554 + ... + 3702153.

Almost surely, 2^2221112100 is an apocalyptic number.

2221112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221112100 is an abundant number, since it is smaller than the sum of its proper divisors (4205306444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221112100 is a wasteful number, since it uses less digits than its factorization.

2221112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403724 (or 7403717 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2221112100 is about 47128.6759839485. The cubic root of 2221112100 is about 1304.7385451170.

Adding to 2221112100 its reverse (12111222), we get a palindrome (2233223322).

The spelling of 2221112100 in words is "two billion, two hundred twenty-one million, one hundred twelve thousand, one hundred".