12221221112 has 8 divisors (see below), whose sum is σ = 22914789600. Its totient is φ = 6110610552.

The previous prime is 12221221091. The next prime is 12221221121. The reversal of 12221221112 is 21112212221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763826312 + ... + 763826327.

It is an arithmetic number, because the mean of its divisors is an integer number (2864348700).

Almost surely, 2^12221221112 is an apocalyptic number.

It is an amenable number.

12221221112 is a deficient number, since it is larger than the sum of its proper divisors (10693568488).

12221221112 is a wasteful number, since it uses less digits than its factorization.

12221221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527652645 (or 1527652641 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 12221221112 its reverse (21112212221), we get a palindrome (33333433333).

The spelling of 12221221112 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".