12021111222222 has 32 divisors (see below), whose sum is σ = 24825302092800. Its totient is φ = 3876602175360.

The previous prime is 12021111222221. The next prime is 12021111222247. The reversal of 12021111222222 is 22222211112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021111222221) 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, 9181723 + ... + 10408950.

It is an arithmetic number, because the mean of its divisors is an integer number (775790690400).

Almost surely, 2^{12021111222222} is an apocalyptic number.

12021111222222 is an abundant number, since it is smaller than the sum of its proper divisors (12804190870578).

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

12021111222222 is a wasteful number, since it uses less digits than its factorization.

12021111222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594008.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12021111222222 its reverse (22222211112021), we get a palindrome (34243322334243).

The spelling of 12021111222222 in words is "twelve trillion, twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".