112121021208 has 128 divisors (see below), whose sum is σ = 326345541120. Its totient is φ = 31437020160.

The previous prime is 112121021197. The next prime is 112121021209. The reversal of 112121021208 is 802120121211.

It is a super-2 number, since 2×112121021208² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4527516 + ... + 4552212.

It is an arithmetic number, because the mean of its divisors is an integer number (2549574540).

Almost surely, 2^112121021208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 112121021208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163172770560).

112121021208 is an abundant number, since it is smaller than the sum of its proper divisors (214224519912).

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

112121021208 is a wasteful number, since it uses less digits than its factorization.

112121021208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25217 (or 25213 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 112121021208 its reverse (802120121211), we get a palindrome (914241142419).

The spelling of 112121021208 in words is "one hundred twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred eight".