2221102001 has 4 divisors (see below), whose sum is σ = 2223091572. Its totient is φ = 2219112432.

The previous prime is 2221101947. The next prime is 2221102021. The reversal of 2221102001 is 1002011222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 665588401 + 1555513600 = 25799^2 + 39440^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221102001 - 2⁶ = 2221101937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221102021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993110 + ... + 995343.

It is an arithmetic number, because the mean of its divisors is an integer number (555772893).

Almost surely, 2^2221102001 is an apocalyptic number.

It is an amenable number.

2221102001 is a deficient number, since it is larger than the sum of its proper divisors (1989571).

2221102001 is a wasteful number, since it uses less digits than its factorization.

2221102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989570.

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

The square root of 2221102001 is about 47128.5688409907. The cubic root of 2221102001 is about 1304.7365676430.

Adding to 2221102001 its reverse (1002011222), we get a palindrome (3223113223).

The spelling of 2221102001 in words is "two billion, two hundred twenty-one million, one hundred two thousand, one".