2221100001 has 8 divisors (see below), whose sum is σ = 3290518560. Its totient is φ = 1480733316.

The previous prime is 2221099999. The next prime is 2221100023. The reversal of 2221100001 is 1000011222.

It is not a de Polignac number, because 2221100001 - 2¹ = 2221099999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221100071) 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, 41131455 + ... + 41131508.

It is an arithmetic number, because the mean of its divisors is an integer number (411314820).

Almost surely, 2^2221100001 is an apocalyptic number.

It is an amenable number.

2221100001 is a deficient number, since it is larger than the sum of its proper divisors (1069418559).

2221100001 is an equidigital number, since it uses as much as digits as its factorization.

2221100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82262972 (or 82262966 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2221100001 is about 47128.5476224337. The cubic root of 2221100001 is about 1304.7361760245.

Adding to 2221100001 its reverse (1000011222), we get a palindrome (3221111223).

The spelling of 2221100001 in words is "two billion, two hundred twenty-one million, one hundred thousand, one".