1220100110220 has 96 divisors (see below), whose sum is σ = 3474362884608. Its totient is φ = 319857403392.

The previous prime is 1220100110213. The next prime is 1220100110233. The reversal of 1220100110220 is 220110010221.

It is a super-2 number, since 2×1220100110220² (a number of 25 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 = 1220100110196 and 1220100110205.

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, 890977 + ... + 1798343.

It is an arithmetic number, because the mean of its divisors is an integer number (36191280048).

Almost surely, 2^{1220100110220} is an apocalyptic number.

1220100110220 is a gapful number since it is divisible by the number (10) 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 1220100110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737181442304).

1220100110220 is an abundant number, since it is smaller than the sum of its proper divisors (2254262774388).

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

1220100110220 is a wasteful number, since it uses less digits than its factorization.

1220100110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907759 (or 907757 counting only the distinct ones).

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

Adding to 1220100110220 its reverse (220110010221), we get a palindrome (1440210120441).

Subtracting from 1220100110220 its reverse (220110010221), we obtain a palindrome (999990099999).

It can be divided in two parts, 12201001 and 10220, that added together give a palindrome (12211221).

The spelling of 1220100110220 in words is "one trillion, two hundred twenty billion, one hundred million, one hundred ten thousand, two hundred twenty".