222220121222201 has 4 divisors (see below), whose sum is σ = 222225297722100. Its totient is φ = 222214944722304.

The previous prime is 222220121222179. The next prime is 222220121222221. The reversal of 222220121222201 is 102222121022222.

222220121222201 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.

It can be written as a sum of positive squares in 2 ways, for example, as 17808020202025 + 204412101020176 = 4219955^2 + 14297276^2 .

It is a cyclic number.

It is not a de Polignac number, because 222220121222201 - 2¹⁰ = 222220121221177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222220121222221) 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, 2588185556 + ... + 2588271413.

It is an arithmetic number, because the mean of its divisors is an integer number (55556324430525).

Almost surely, 2^{222220121222201} is an apocalyptic number.

It is an amenable number.

222220121222201 is a deficient number, since it is larger than the sum of its proper divisors (5176499899).

222220121222201 is an equidigital number, since it uses as much as digits as its factorization.

222220121222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176499898.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222220121222201 its reverse (102222121022222), we get a palindrome (324442242244423).

The spelling of 222220121222201 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".