22201211221 has 8 divisors (see below), whose sum is σ = 25373715584. Its totient is φ = 19028932560.

The previous prime is 22201211129. The next prime is 22201211293. The reversal of 22201211221 is 12211210222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22201211221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22201211195 and 22201211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201211521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340936 + ... + 400798.

It is an arithmetic number, because the mean of its divisors is an integer number (3171714448).

Almost surely, 2^22201211221 is an apocalyptic number.

It is an amenable number.

22201211221 is a deficient number, since it is larger than the sum of its proper divisors (3172504363).

22201211221 is an equidigital number, since it uses as much as digits as its factorization.

22201211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112851.

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

Adding to 22201211221 its reverse (12211210222), we get a palindrome (34412421443).

Subtracting from 22201211221 its reverse (12211210222), we obtain a palindrome (9990000999).

The spelling of 22201211221 in words is "twenty-two billion, two hundred one million, two hundred eleven thousand, two hundred twenty-one".