11112220020 has 48 divisors (see below), whose sum is σ = 33942783168. Its totient is φ = 2693871360.

The previous prime is 11112220019. The next prime is 11112220039. The reversal of 11112220020 is 2002221111.

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 = 11112219978 and 11112220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8417689 + ... + 8419008.

It is an arithmetic number, because the mean of its divisors is an integer number (707141316).

Almost surely, 2^11112220020 is an apocalyptic number.

11112220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112220020 is an abundant number, since it is smaller than the sum of its proper divisors (22830563148).

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

11112220020 is a wasteful number, since it uses less digits than its factorization.

11112220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16836720 (or 16836718 counting only the distinct ones).

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

Adding to 11112220020 its reverse (2002221111), we get a palindrome (13114441131).

It can be divided in two parts, 11112 and 220020, that added together give a palindrome (231132).

The spelling of 11112220020 in words is "eleven billion, one hundred twelve million, two hundred twenty thousand, twenty".