11212100220 has 48 divisors (see below), whose sum is σ = 31403221920. Its totient is φ = 2989003776.

The previous prime is 11212100197. The next prime is 11212100239. The reversal of 11212100220 is 2200121211.

It is a super-2 number, since 2×11212100220² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 11212100196 and 11212100205.

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, 189576 + ... + 241584.

It is an arithmetic number, because the mean of its divisors is an integer number (654233790).

Almost surely, 2^11212100220 is an apocalyptic number.

11212100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212100220 is an abundant number, since it is smaller than the sum of its proper divisors (20191121700).

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

11212100220 is a wasteful number, since it uses less digits than its factorization.

11212100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55614 (or 55612 counting only the distinct ones).

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

Adding to 11212100220 its reverse (2200121211), we get a palindrome (13412221431).

The spelling of 11212100220 in words is "eleven billion, two hundred twelve million, one hundred thousand, two hundred twenty".