22211201221 has 8 divisors (see below), whose sum is σ = 24262250688. Its totient is φ = 20165460000.

The previous prime is 22211201213. The next prime is 22211201279. The reversal of 22211201221 is 12210211222.

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 not a de Polignac number, because 22211201221 - 2³ = 22211201213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211201195 and 22211201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211201281) 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, 1318305 + ... + 1335046.

It is an arithmetic number, because the mean of its divisors is an integer number (3032781336).

Almost surely, 2^22211201221 is an apocalyptic number.

It is an amenable number.

22211201221 is a deficient number, since it is larger than the sum of its proper divisors (2051049467).

22211201221 is a wasteful number, since it uses less digits than its factorization.

22211201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654123.

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

Adding to 22211201221 its reverse (12210211222), we get a palindrome (34421412443).

The spelling of 22211201221 in words is "twenty-two billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".