12221100312 has 32 divisors (see below), whose sum is σ = 30634684080. Its totient is φ = 4062775680.

The previous prime is 12221100299. The next prime is 12221100313. The reversal of 12221100312 is 21300112221.

It is a junction number, because it is equal to n+sod(n) for n = 12221100291 and 12221100300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221100313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673639 + ... + 691542.

Almost surely, 2^12221100312 is an apocalyptic number.

12221100312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221100312 is an abundant number, since it is smaller than the sum of its proper divisors (18413583768).

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

12221100312 is a wasteful number, since it uses less digits than its factorization.

12221100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365563 (or 1365559 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12221100312 its reverse (21300112221), we get a palindrome (33521212533).

The spelling of 12221100312 in words is "twelve billion, two hundred twenty-one million, one hundred thousand, three hundred twelve".