12221101112212 has 12 divisors (see below), whose sum is σ = 21417091869460. Its totient is φ = 6101932006656.

The previous prime is 12221101112201. The next prime is 12221101112243. The reversal of 12221101112212 is 21221110112221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1027620128656 + 11193480983556 = 1013716^2 + 3345666^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12221101112212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154634173 + ... + 2154639844.

Almost surely, 2^{12221101112212} is an apocalyptic number.

It is an amenable number.

12221101112212 is a deficient number, since it is larger than the sum of its proper divisors (9195990757248).

12221101112212 is a wasteful number, since it uses less digits than its factorization.

12221101112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309274730 (or 4309274728 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12221101112212 its reverse (21221110112221), we get a palindrome (33442211224433).

Subtracting 12221101112212 from its reverse (21221110112221), we obtain a palindrome (9000009000009).

The spelling of 12221101112212 in words is "twelve trillion, two hundred twenty-one billion, one hundred one million, one hundred twelve thousand, two hundred twelve".