2111221100 has 36 divisors (see below), whose sum is σ = 4822477800. Its totient is φ = 800040960.

The previous prime is 2111221097. The next prime is 2111221103. The reversal of 2111221100 is 11221112.

It is an interprime number because it is at equal distance from previous prime (2111221097) and next prime (2111221103).

It is not an unprimeable number, because it can be changed into a prime (2111221103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553685 + ... + 557484.

Almost surely, 2^2111221100 is an apocalyptic number.

2111221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111221100 is an abundant number, since it is smaller than the sum of its proper divisors (2711256700).

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

2111221100 is a wasteful number, since it uses less digits than its factorization.

2111221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111202 (or 1111195 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2111221100 is about 45948.0260729446. The cubic root of 2111221100 is about 1282.8559885841.

Adding to 2111221100 its reverse (11221112), we get a palindrome (2122442212).

The spelling of 2111221100 in words is "two billion, one hundred eleven million, two hundred twenty-one thousand, one hundred".