20110112220 has 48 divisors (see below), whose sum is σ = 61427253888. Its totient is φ = 4875178560.

The previous prime is 20110112153. The next prime is 20110112227. The reversal of 20110112220 is 2221101102.

It is a super-2 number, since 2×20110112220² (a number of 21 digits) contains 22 as substring.

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 = 20110112196 and 20110112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110112227) 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, 15234274 + ... + 15235593.

It is an arithmetic number, because the mean of its divisors is an integer number (1279734456).

Almost surely, 2^20110112220 is an apocalyptic number.

20110112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110112220 is an abundant number, since it is smaller than the sum of its proper divisors (41317141668).

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

20110112220 is a wasteful number, since it uses less digits than its factorization.

20110112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30469890 (or 30469888 counting only the distinct ones).

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

Adding to 20110112220 its reverse (2221101102), we get a palindrome (22331213322).

The spelling of 20110112220 in words is "twenty billion, one hundred ten million, one hundred twelve thousand, two hundred twenty".