222110211021121 has 4 divisors (see below), whose sum is σ = 222110286034644. Its totient is φ = 222110136007600.

The previous prime is 222110211021113. The next prime is 222110211021143. The reversal of 222110211021121 is 121120112011222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69066986529025 + 153043224492096 = 8310655^2 + 12371064^2 .

It is a cyclic number.

It is not a de Polignac number, because 222110211021121 - 2³ = 222110211021113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222110211021151) 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, 32874670 + ... + 39050791.

It is an arithmetic number, because the mean of its divisors is an integer number (55527571508661).

Almost surely, 2^{222110211021121} is an apocalyptic number.

It is an amenable number.

222110211021121 is a deficient number, since it is larger than the sum of its proper divisors (75013523).

222110211021121 is an equidigital number, since it uses as much as digits as its factorization.

222110211021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75013522.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222110211021121 its reverse (121120112011222), we get a palindrome (343230323032343).

The spelling of 222110211021121 in words is "two hundred twenty-two trillion, one hundred ten billion, two hundred eleven million, twenty-one thousand, one hundred twenty-one".