22312011221 has 8 divisors (see below), whose sum is σ = 22800939264. Its totient is φ = 21823675120.

The previous prime is 22312011203. The next prime is 22312011223. The reversal of 22312011221 is 12211021322.

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 22312011221 - 2⁶ = 22312011157 is a prime.

It is a super-3 number, since 3×22312011221³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22312011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22312011223) 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, 71345 + ... + 222966.

It is an arithmetic number, because the mean of its divisors is an integer number (2850117408).

Almost surely, 2^22312011221 is an apocalyptic number.

It is an amenable number.

22312011221 is a deficient number, since it is larger than the sum of its proper divisors (488928043).

22312011221 is a wasteful number, since it uses less digits than its factorization.

22312011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295971.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22312011221 its reverse (12211021322), we get a palindrome (34523032543).

The spelling of 22312011221 in words is "twenty-two billion, three hundred twelve million, eleven thousand, two hundred twenty-one".