222222021001021 has 4 divisors (see below), whose sum is σ = 233917916843200. Its totient is φ = 210526125158844.

The previous prime is 222222021001007. The next prime is 222222021001087. The reversal of 222222021001021 is 120100120222222.

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 222222021001021 - 2⁷ = 222222021000893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11695895842159 = 222222021001021 / (2 + 2 + 2 + 2 + 2 + 2 + 0 + 2 + 1 + 0 + 0 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222222021001021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222021001091) 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, 5847947921061 + ... + 5847947921098.

It is an arithmetic number, because the mean of its divisors is an integer number (58479479210800).

Almost surely, 2^{222222021001021} is an apocalyptic number.

It is an amenable number.

222222021001021 is a deficient number, since it is larger than the sum of its proper divisors (11695895842179).

222222021001021 is a wasteful number, since it uses less digits than its factorization.

222222021001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11695895842178.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222222021001021 its reverse (120100120222222), we get a palindrome (342322141223243).

The spelling of 222222021001021 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, twenty-one million, one thousand, twenty-one".