11212202220 has 48 divisors (see below), whose sum is σ = 31525562880. Its totient is φ = 2977406656.

The previous prime is 11212202207. The next prime is 11212202249. The reversal of 11212202220 is 2220221211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11212202220.

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, 376602 + ... + 405281.

It is an arithmetic number, because the mean of its divisors is an integer number (656782560).

Almost surely, 2^11212202220 is an apocalyptic number.

11212202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212202220 is an abundant number, since it is smaller than the sum of its proper divisors (20313360660).

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

11212202220 is a wasteful number, since it uses less digits than its factorization.

11212202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782134 (or 782132 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11212202220 its reverse (2220221211), we get a palindrome (13432423431).

The spelling of 11212202220 in words is "eleven billion, two hundred twelve million, two hundred two thousand, two hundred twenty".