1001111002220 has 144 divisors (see below), whose sum is σ = 2489890233600. Its totient is φ = 337067531136.

The previous prime is 1001111002187. The next prime is 1001111002253. The reversal of 1001111002220 is 222001111001.

It is an interprime number because it is at equal distance from previous prime (1001111002187) and next prime (1001111002253).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13546931 + ... + 13620629.

It is an arithmetic number, because the mean of its divisors is an integer number (17290904400).

Almost surely, 2^{1001111002220} is an apocalyptic number.

1001111002220 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 1001111002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244945116800).

1001111002220 is an abundant number, since it is smaller than the sum of its proper divisors (1488779231380).

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

1001111002220 is a wasteful number, since it uses less digits than its factorization.

1001111002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73972 (or 73963 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001111002220 its reverse (222001111001), we get a palindrome (1223112113221).

The spelling of 1001111002220 in words is "one trillion, one billion, one hundred eleven million, two thousand, two hundred twenty".