11211002220 has 96 divisors (see below), whose sum is σ = 35170119936. Its totient is φ = 2644358400.

The previous prime is 11211002191. The next prime is 11211002227. The reversal of 11211002220 is 2220011211.

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 = 11211002196 and 11211002205.

It is not an unprimeable number, because it can be changed into a prime (11211002227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205126 + ... + 253965.

It is an arithmetic number, because the mean of its divisors is an integer number (366355416).

Almost surely, 2^11211002220 is an apocalyptic number.

11211002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211002220 is an abundant number, since it is smaller than the sum of its proper divisors (23959117716).

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

11211002220 is a wasteful number, since it uses less digits than its factorization.

11211002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459151 (or 459149 counting only the distinct ones).

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

Adding to 11211002220 its reverse (2220011211), we get a palindrome (13431013431).

The spelling of 11211002220 in words is "eleven billion, two hundred eleven million, two thousand, two hundred twenty".