20001112220 has 12 divisors (see below), whose sum is σ = 42002335704. Its totient is φ = 8000444880.

The previous prime is 20001112217. The next prime is 20001112231. The reversal of 20001112220 is 2221110002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500027786 + ... + 500027825.

It is an arithmetic number, because the mean of its divisors is an integer number (3500194642).

Almost surely, 2^20001112220 is an apocalyptic number.

20001112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001112220 is an abundant number, since it is smaller than the sum of its proper divisors (22001223484).

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

20001112220 is a wasteful number, since it uses less digits than its factorization.

20001112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000055620 (or 1000055618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20001112220 its reverse (2221110002), we get a palindrome (22222222222).

The spelling of 20001112220 in words is "twenty billion, one million, one hundred twelve thousand, two hundred twenty".