121211112112 has 40 divisors (see below), whose sum is σ = 237628987200. Its totient is φ = 59888328192.

The previous prime is 121211112103. The next prime is 121211112133. The reversal of 121211112112 is 211211112121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2408713 + ... + 2458519.

It is an arithmetic number, because the mean of its divisors is an integer number (5940724680).

Almost surely, 2^121211112112 is an apocalyptic number.

It is an amenable number.

121211112112 is a deficient number, since it is larger than the sum of its proper divisors (116417875088).

121211112112 is a wasteful number, since it uses less digits than its factorization.

121211112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51613 (or 51607 counting only the distinct ones).

The product of its digits is 16, while the sum is 16.

Adding to 121211112112 its reverse (211211112121), we get a palindrome (332422224233).

Subtracting 121211112112 from its reverse (211211112121), we obtain a palindrome (90000000009).

The spelling of 121211112112 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred twelve".