12220222212221 has 16 divisors (see below), whose sum is σ = 12926655924480. Its totient is φ = 11528392740480.

The previous prime is 12220222212199. The next prime is 12220222212241. The reversal of 12220222212221 is 12221222202221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220222212221 is a prime.

It is a super-2 number, since 2×12220222212221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220222212241) 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, 56879720 + ... + 57094158.

It is an arithmetic number, because the mean of its divisors is an integer number (807915995280).

Almost surely, 2^{12220222212221} is an apocalyptic number.

It is an amenable number.

12220222212221 is a deficient number, since it is larger than the sum of its proper divisors (706433712259).

12220222212221 is a wasteful number, since it uses less digits than its factorization.

12220222212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248476.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 12220222212221 its reverse (12221222202221), we get a palindrome (24441444414442).

The spelling of 12220222212221 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".