2201120100 has 54 divisors (see below), whose sum is σ = 6899291490. Its totient is φ = 586965120.

The previous prime is 2201120093. The next prime is 2201120111. The reversal of 2201120100 is 10211022.

It can be written as a sum of positive squares in 3 ways, for example, as 330730596 + 1870389504 = 18186^2 + 43248^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1221945 + ... + 1223744.

Almost surely, 2^2201120100 is an apocalyptic number.

2201120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201120100 is an abundant number, since it is smaller than the sum of its proper divisors (4698171390).

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

2201120100 is a wasteful number, since it uses less digits than its factorization.

2201120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445709 (or 2445699 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2201120100 is about 46916.0963849296. The cubic root of 2201120100 is about 1300.8121355354.

Adding to 2201120100 its reverse (10211022), we get a palindrome (2211331122).

The spelling of 2201120100 in words is "two billion, two hundred one million, one hundred twenty thousand, one hundred".