22211002001 has 4 divisors (see below), whose sum is σ = 22211310900. Its totient is φ = 22210693104.

The previous prime is 22211001983. The next prime is 22211002003. The reversal of 22211002001 is 10020011222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 241833601 + 21969168400 = 15551^2 + 148220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22211002001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22211002003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16415 + ... + 211403.

It is an arithmetic number, because the mean of its divisors is an integer number (5552827725).

Almost surely, 2^22211002001 is an apocalyptic number.

It is an amenable number.

22211002001 is a deficient number, since it is larger than the sum of its proper divisors (308899).

22211002001 is a wasteful number, since it uses less digits than its factorization.

22211002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308898.

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

Adding to 22211002001 its reverse (10020011222), we get a palindrome (32231013223).

The spelling of 22211002001 in words is "twenty-two billion, two hundred eleven million, two thousand, one".