1001001220220 has 24 divisors (see below), whose sum is σ = 2104211032224. Its totient is φ = 399998874816.

The previous prime is 1001001220217. The next prime is 1001001220249. The reversal of 1001001220220 is 220221001001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25080392 + ... + 25120271.

It is an arithmetic number, because the mean of its divisors is an integer number (87675459676).

Almost surely, 2^{1001001220220} is an apocalyptic number.

1001001220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001001220220 is an abundant number, since it is smaller than the sum of its proper divisors (1103209812004).

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

1001001220220 is a wasteful number, since it uses less digits than its factorization.

1001001220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50201669 (or 50201667 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1001001220220 its reverse (220221001001), we get a palindrome (1221222221221).

It can be divided in two parts, 1001001 and 220220, that added together give a palindrome (1221221).

The spelling of 1001001220220 in words is "one trillion, one billion, one million, two hundred twenty thousand, two hundred twenty".