22312212221 has 16 divisors (see below), whose sum is σ = 25336449600. Its totient is φ = 19478527488.

The previous prime is 22312212203. The next prime is 22312212229. The reversal of 22312212221 is 12221221322.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22312212221 is a prime.

It is a super-3 number, since 3×22312212221³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22312212193 and 22312212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22312212229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68045 + ... + 221933.

It is an arithmetic number, because the mean of its divisors is an integer number (1583528100).

Almost surely, 2^22312212221 is an apocalyptic number.

It is an amenable number.

22312212221 is a deficient number, since it is larger than the sum of its proper divisors (3024237379).

22312212221 is a wasteful number, since it uses less digits than its factorization.

22312212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154508.

The product of its digits is 384, while the sum is 20.

Adding to 22312212221 its reverse (12221221322), we get a palindrome (34533433543).

The spelling of 22312212221 in words is "twenty-two billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty-one".