2222121100201 has 4 divisors (see below), whose sum is σ = 2234965731012. Its totient is φ = 2209276469392.

The previous prime is 2222121100193. The next prime is 2222121100207. The reversal of 2222121100201 is 1020011212222.

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 2023935867801 + 198185232400 = 1422651^2 + 445180^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222121100201 - 2³ = 2222121100193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222121100207) 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, 6422315146 + ... + 6422315491.

It is an arithmetic number, because the mean of its divisors is an integer number (558741432753).

Almost surely, 2^{2222121100201} is an apocalyptic number.

It is an amenable number.

2222121100201 is a deficient number, since it is larger than the sum of its proper divisors (12844630811).

2222121100201 is a wasteful number, since it uses less digits than its factorization.

2222121100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12844630810.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2222121100201 its reverse (1020011212222), we get a palindrome (3242132312423).

The spelling of 2222121100201 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, two hundred one".