22221202021001 has 4 divisors (see below), whose sum is σ = 22428876806352. Its totient is φ = 22013527235652.

The previous prime is 22221202020991. The next prime is 22221202021013. The reversal of 22221202021001 is 10012020212222.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 22221202021001 - 2²² = 22221197826697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221202021091) 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, 103837392515 + ... + 103837392728.

It is an arithmetic number, because the mean of its divisors is an integer number (5607219201588).

Almost surely, 2^{22221202021001} is an apocalyptic number.

It is an amenable number.

22221202021001 is a deficient number, since it is larger than the sum of its proper divisors (207674785351).

22221202021001 is a wasteful number, since it uses less digits than its factorization.

22221202021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207674785350.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22221202021001 its reverse (10012020212222), we get a palindrome (32233222233223).

The spelling of 22221202021001 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, twenty-one thousand, one".