11222112220020 has 144 divisors (see below), whose sum is σ = 36789360792912. Its totient is φ = 2752535439360.

The previous prime is 11222112219977. The next prime is 11222112220051. The reversal of 11222112220020 is 2002221122211.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 871784676 + 11221240435344 = 29526^2 + 3349812^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11222112219975 and 11222112220002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7875867 + ... + 9190946.

It is an arithmetic number, because the mean of its divisors is an integer number (255481672173).

Almost surely, 2^{11222112220020} is an apocalyptic number.

11222112220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222112220020 is an abundant number, since it is smaller than the sum of its proper divisors (25567248572892).

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

11222112220020 is a wasteful number, since it uses less digits than its factorization.

11222112220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17067122 (or 17067117 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11222112220020 its reverse (2002221122211), we get a palindrome (13224333342231).

The spelling of 11222112220020 in words is "eleven trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twenty thousand, twenty".