11100211220 has 24 divisors (see below), whose sum is σ = 26640507264. Its totient is φ = 3805786656.

The previous prime is 11100211201. The next prime is 11100211231. The reversal of 11100211220 is 2211200111.

It is a super-2 number, since 2×11100211220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39643472 + ... + 39643751.

It is an arithmetic number, because the mean of its divisors is an integer number (1110021136).

Almost surely, 2^11100211220 is an apocalyptic number.

11100211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100211220 is an abundant number, since it is smaller than the sum of its proper divisors (15540296044).

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

11100211220 is a wasteful number, since it uses less digits than its factorization.

11100211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79287239 (or 79287237 counting only the distinct ones).

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

Adding to 11100211220 its reverse (2211200111), we get a palindrome (13311411331).

The spelling of 11100211220 in words is "eleven billion, one hundred million, two hundred eleven thousand, two hundred twenty".