222211001112221 has 4 divisors (see below), whose sum is σ = 242412001213344. Its totient is φ = 202010001011100.

The previous prime is 222211001112187. The next prime is 222211001112259. The reversal of 222211001112221 is 122211100112222.

222211001112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 222211001112221 - 2¹⁸ = 222211000850077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211001112193 and 222211001112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211001112271) 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, 10100500050545 + ... + 10100500050566.

It is an arithmetic number, because the mean of its divisors is an integer number (60603000303336).

Almost surely, 2^{222211001112221} is an apocalyptic number.

It is an amenable number.

222211001112221 is a deficient number, since it is larger than the sum of its proper divisors (20201000101123).

222211001112221 is a wasteful number, since it uses less digits than its factorization.

222211001112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201000101122.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222211001112221 its reverse (122211100112222), we get a palindrome (344422101224443).

Subtracting from 222211001112221 its reverse (122211100112222), we obtain a palindrome (99999900999999).

It can be divided in two parts, 222211001 and 112221, that added together give a palindrome (222323222).

The spelling of 222211001112221 in words is "two hundred twenty-two trillion, two hundred eleven billion, one million, one hundred twelve thousand, two hundred twenty-one".