11011222221220 has 24 divisors (see below), whose sum is σ = 24902302562424. Its totient is φ = 4065682050816.

The previous prime is 11011222221173. The next prime is 11011222221283. The reversal of 11011222221220 is 2212222211011.

It can be written as a sum of positive squares in 4 ways, for example, as 267760711936 + 10743461509284 = 517456^2 + 3277722^2 .

It is a super-2 number, since 2×11011222221220² (a number of 27 digits) contains 22 as substring.

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, 21175427089 + ... + 21175427608.

It is an arithmetic number, because the mean of its divisors is an integer number (1037595940101).

Almost surely, 2^{11011222221220} is an apocalyptic number.

11011222221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011222221220 is an abundant number, since it is smaller than the sum of its proper divisors (13891080341204).

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

11011222221220 is a wasteful number, since it uses less digits than its factorization.

11011222221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42350854719 (or 42350854717 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11011222221220 its reverse (2212222211011), we get a palindrome (13223444432231).

The spelling of 11011222221220 in words is "eleven trillion, eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".