222100022100221 has 4 divisors (see below), whose sum is σ = 222301382048832. Its totient is φ = 221898662151612.

The previous prime is 222100022100169. The next prime is 222100022100251. The reversal of 222100022100221 is 122001220001222.

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 222100022100221 - 2⁴² = 217701975589117 is a prime.

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 222100022100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100022100251) 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, 100679972651 + ... + 100679974856.

It is an arithmetic number, because the mean of its divisors is an integer number (55575345512208).

Almost surely, 2^{222100022100221} is an apocalyptic number.

It is an amenable number.

222100022100221 is a deficient number, since it is larger than the sum of its proper divisors (201359948611).

222100022100221 is a wasteful number, since it uses less digits than its factorization.

222100022100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201359948610.

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

Adding to 222100022100221 its reverse (122001220001222), we get a palindrome (344101242101443).

The spelling of 222100022100221 in words is "two hundred twenty-two trillion, one hundred billion, twenty-two million, one hundred thousand, two hundred twenty-one".