22222222021001 has 8 divisors (see below), whose sum is σ = 22254429966984. Its totient is φ = 22190019229440.

The previous prime is 22222222020997. The next prime is 22222222021003. The reversal of 22222222021001 is 10012022222222.

It can be written as a sum of positive squares in 4 ways, for example, as 2557440640000 + 19664781381001 = 1599200^2 + 4434499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22222222021001 - 2² = 22222222020997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222222021003) 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, 7382465 + ... + 9947121.

It is an arithmetic number, because the mean of its divisors is an integer number (2781803745873).

Almost surely, 2^{22222222021001} is an apocalyptic number.

It is an amenable number.

22222222021001 is a deficient number, since it is larger than the sum of its proper divisors (32207945983).

22222222021001 is a wasteful number, since it uses less digits than its factorization.

22222222021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577211.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22222222021001 its reverse (10012022222222), we get a palindrome (32234244243223).

The spelling of 22222222021001 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, one".