20110222222220 has 96 divisors (see below), whose sum is σ = 46153710187200. Its totient is φ = 7316087215104.

The previous prime is 20110222222219. The next prime is 20110222222301. The reversal of 20110222222220 is 2222222201102.

It is a super-2 number, since 2×20110222222220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20110222222192 and 20110222222201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3090722 + ... + 7054998.

It is an arithmetic number, because the mean of its divisors is an integer number (480767814450).

Almost surely, 2^{20110222222220} is an apocalyptic number.

20110222222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110222222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23076855093600).

20110222222220 is an abundant number, since it is smaller than the sum of its proper divisors (26043487964980).

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

20110222222220 is a wasteful number, since it uses less digits than its factorization.

20110222222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964587 (or 3964585 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20110222222220 its reverse (2222222201102), we get a palindrome (22332444423322).

The spelling of 20110222222220 in words is "twenty trillion, one hundred ten billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".