22222221221001 has 16 divisors (see below), whose sum is σ = 31700378853440. Its totient is φ = 13805003689920.

The previous prime is 22222221220967. The next prime is 22222221221003. The reversal of 22222221221001 is 10012212222222.

It is not a de Polignac number, because 22222221221001 - 2²¹ = 22222219123849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222221221003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3195599230 + ... + 3195606183.

It is an arithmetic number, because the mean of its divisors is an integer number (1981273678340).

Almost surely, 2^{22222221221001} is an apocalyptic number.

It is an amenable number.

22222221221001 is a deficient number, since it is larger than the sum of its proper divisors (9478157632439).

22222221221001 is a wasteful number, since it uses less digits than its factorization.

22222221221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391205496.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22222221221001 its reverse (10012212222222), we get a palindrome (32234433443223).

The spelling of 22222221221001 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, one".