20000111220 has 48 divisors (see below), whose sum is σ = 62222569920. Its totient is φ = 5333362848.

The previous prime is 20000111191. The next prime is 20000111221. The reversal of 20000111220 is 2211100002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000111221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18518082 + ... + 18519161.

It is an arithmetic number, because the mean of its divisors is an integer number (1296303540).

Almost surely, 2^20000111220 is an apocalyptic number.

20000111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000111220 is an abundant number, since it is smaller than the sum of its proper divisors (42222458700).

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

20000111220 is a wasteful number, since it uses less digits than its factorization.

20000111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37037261 (or 37037253 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20000111220 its reverse (2211100002), we get a palindrome (22211211222).

The spelling of 20000111220 in words is "twenty billion, one hundred eleven thousand, two hundred twenty".