10001111222220 has 48 divisors (see below), whose sum is σ = 28531472024160. Its totient is φ = 2616642935296.

The previous prime is 10001111222197. The next prime is 10001111222237. The reversal of 10001111222220 is 2222211110001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10001111222220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1572498585 + ... + 1572504944.

It is an arithmetic number, because the mean of its divisors is an integer number (594405667170).

Almost surely, 2^{10001111222220} is an apocalyptic number.

10001111222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001111222220 is an abundant number, since it is smaller than the sum of its proper divisors (18530360801940).

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

10001111222220 is a wasteful number, since it uses less digits than its factorization.

10001111222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145003594 (or 3145003592 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10001111222220 its reverse (2222211110001), we get a palindrome (12223322332221).

The spelling of 10001111222220 in words is "ten trillion, one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".