12101221112 has 16 divisors (see below), whose sum is σ = 24024483360. Its totient is φ = 5694692224.

The previous prime is 12101221103. The next prime is 12101221117. The reversal of 12101221112 is 21112210121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101221117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44489648 + ... + 44489919.

It is an arithmetic number, because the mean of its divisors is an integer number (1501530210).

Almost surely, 2^12101221112 is an apocalyptic number.

It is an amenable number.

12101221112 is a deficient number, since it is larger than the sum of its proper divisors (11923262248).

12101221112 is a wasteful number, since it uses less digits than its factorization.

12101221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88979590 (or 88979586 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12101221112 its reverse (21112210121), we get a palindrome (33213431233).

The spelling of 12101221112 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred twelve".