22201200121 has 4 divisors (see below), whose sum is σ = 22228643700. Its totient is φ = 22173756544.

The previous prime is 22201200113. The next prime is 22201200139. The reversal of 22201200121 is 12100210222.

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 12783468096 + 9417732025 = 113064^2 + 97045^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201200121 - 2³ = 22201200113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22201200181) 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, 13720576 + ... + 13722193.

It is an arithmetic number, because the mean of its divisors is an integer number (5557160925).

Almost surely, 2^22201200121 is an apocalyptic number.

It is an amenable number.

22201200121 is a deficient number, since it is larger than the sum of its proper divisors (27443579).

22201200121 is an equidigital number, since it uses as much as digits as its factorization.

22201200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27443578.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22201200121 its reverse (12100210222), we get a palindrome (34301410343).

The spelling of 22201200121 in words is "twenty-two billion, two hundred one million, two hundred thousand, one hundred twenty-one".