11122221021220 has 24 divisors (see below), whose sum is σ = 23356915735608. Its totient is φ = 4448840486400.

The previous prime is 11122221021203. The next prime is 11122221021257. The reversal of 11122221021220 is 2212012222111.

It can be written as a sum of positive squares in 4 ways, for example, as 1908713559844 + 9213507461376 = 1381562^2 + 3035376^2 .

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, 1061551 + ... + 4834390.

It is an arithmetic number, because the mean of its divisors is an integer number (973204822317).

Almost surely, 2^{11122221021220} is an apocalyptic number.

11122221021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11122221021220 is an abundant number, since it is smaller than the sum of its proper divisors (12234694714388).

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

11122221021220 is a wasteful number, since it uses less digits than its factorization.

11122221021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990271 (or 5990269 counting only the distinct ones).

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

Adding to 11122221021220 its reverse (2212012222111), we get a palindrome (13334233243331).

The spelling of 11122221021220 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty".