11222121022220 has 24 divisors (see below), whose sum is σ = 23581727350944. Its totient is φ = 4485939227136.

The previous prime is 11222121022213. The next prime is 11222121022237. The reversal of 11222121022220 is 2222012122211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11222121022192 and 11222121022201.

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, 181792229 + ... + 181853948.

It is an arithmetic number, because the mean of its divisors is an integer number (982571972956).

Almost surely, 2^{11222121022220} is an apocalyptic number.

11222121022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222121022220 is an abundant number, since it is smaller than the sum of its proper divisors (12359606328724).

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

11222121022220 is a wasteful number, since it uses less digits than its factorization.

11222121022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363647729 (or 363647727 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11222121022220 its reverse (2222012122211), we get a palindrome (13444133144431).

The spelling of 11222121022220 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty".