1001220220220 has 96 divisors (see below), whose sum is σ = 2387008673280. Its totient is φ = 349420279040.

The previous prime is 1001220220193. The next prime is 1001220220223. The reversal of 1001220220220 is 220220221001.

It is a junction number, because it is equal to n+sod(n) for n = 1001220220195 and 1001220220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001220220223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 595607 + ... + 1535313.

It is an arithmetic number, because the mean of its divisors is an integer number (24864673680).

Almost surely, 2^{1001220220220} is an apocalyptic number.

1001220220220 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 1001220220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1193504336640).

1001220220220 is an abundant number, since it is smaller than the sum of its proper divisors (1385788453060).

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

1001220220220 is a wasteful number, since it uses less digits than its factorization.

1001220220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939923 (or 939921 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1001220220220 its reverse (220220221001), we get a palindrome (1221440441221).

The spelling of 1001220220220 in words is "one trillion, one billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty".