22121200201 has 4 divisors (see below), whose sum is σ = 22160078100. Its totient is φ = 22082322304.

The previous prime is 22121200181. The next prime is 22121200217. The reversal of 22121200201 is 10200212122.

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 12065924025 + 10055276176 = 109845^2 + 100276^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121200201 - 2⁵ = 22121200169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121200301) 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, 19438096 + ... + 19439233.

It is an arithmetic number, because the mean of its divisors is an integer number (5540019525).

Almost surely, 2^22121200201 is an apocalyptic number.

It is an amenable number.

22121200201 is a deficient number, since it is larger than the sum of its proper divisors (38877899).

22121200201 is an equidigital number, since it uses as much as digits as its factorization.

22121200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38877898.

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

Adding to 22121200201 its reverse (10200212122), we get a palindrome (32321412323).

The spelling of 22121200201 in words is "twenty-two billion, one hundred twenty-one million, two hundred thousand, two hundred one".