2001000111220 has 24 divisors (see below), whose sum is σ = 4584109346208. Its totient is φ = 727636404000.

The previous prime is 2001000111203. The next prime is 2001000111223. The reversal of 2001000111220 is 221110001002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2001000111197 and 2001000111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001000111223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4547727306 + ... + 4547727745.

It is an arithmetic number, because the mean of its divisors is an integer number (191004556092).

Almost surely, 2^{2001000111220} is an apocalyptic number.

2001000111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001000111220 is an abundant number, since it is smaller than the sum of its proper divisors (2583109234988).

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

2001000111220 is a wasteful number, since it uses less digits than its factorization.

2001000111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9095455071 (or 9095455069 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2001000111220 its reverse (221110001002), we get a palindrome (2222110112222).

The spelling of 2001000111220 in words is "two trillion, one billion, one hundred eleven thousand, two hundred twenty".