12221221100022 has 24 divisors (see below), whose sum is σ = 28886522600520. Its totient is φ = 3703400333280.

The previous prime is 12221221100003. The next prime is 12221221100063. The reversal of 12221221100022 is 22000112212221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12221221099968 and 12221221100004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30861669247 + ... + 30861669642.

It is an arithmetic number, because the mean of its divisors is an integer number (1203605108355).

Almost surely, 2^{12221221100022} is an apocalyptic number.

12221221100022 is an abundant number, since it is smaller than the sum of its proper divisors (16665301500498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221221100022 is a wasteful number, since it uses less digits than its factorization.

12221221100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61723338908 (or 61723338905 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221221100022 its reverse (22000112212221), we get a palindrome (34221333312243).

The spelling of 12221221100022 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, twenty-two".