12402112122 has 64 divisors (see below), whose sum is σ = 28437373440. Its totient is φ = 4004287488.

The previous prime is 12402112109. The next prime is 12402112139. The reversal of 12402112122 is 22121120421.

12402112122 is a `hidden beast` number, since 1 + 240 + 211 + 212 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12402112095 and 12402112104.

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 31 ways as a sum of consecutive naturals, for example, 220998 + ... + 271374.

It is an arithmetic number, because the mean of its divisors is an integer number (444333960).

Almost surely, 2^12402112122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12402112122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14218686720).

12402112122 is an abundant number, since it is smaller than the sum of its proper divisors (16035261318).

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

12402112122 is a wasteful number, since it uses less digits than its factorization.

12402112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50532 (or 50526 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12402112122 its reverse (22121120421), we get a palindrome (34523232543).

The spelling of 12402112122 in words is "twelve billion, four hundred two million, one hundred twelve thousand, one hundred twenty-two".