22211221001 has 4 divisors (see below), whose sum is σ = 22211523600. Its totient is φ = 22210918404.

The previous prime is 22211220947. The next prime is 22211221033. The reversal of 22211221001 is 10012211222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22211221001 - 2⁶ = 22211220937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22211221061) 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, 36530 + ... + 213908.

It is an arithmetic number, because the mean of its divisors is an integer number (5552880900).

Almost surely, 2^22211221001 is an apocalyptic number.

It is an amenable number.

22211221001 is a deficient number, since it is larger than the sum of its proper divisors (302599).

22211221001 is a wasteful number, since it uses less digits than its factorization.

22211221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302598.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22211221001 its reverse (10012211222), we get a palindrome (32223432223).

The spelling of 22211221001 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, one".