12421212122 has 32 divisors (see below), whose sum is σ = 21102764544. Its totient is φ = 5432241600.

The previous prime is 12421212119. The next prime is 12421212137. The reversal of 12421212122 is 22121212421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12421212094 and 12421212103.

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 15 ways as a sum of consecutive naturals, for example, 65348 + ... + 170624.

It is an arithmetic number, because the mean of its divisors is an integer number (659461392).

Almost surely, 2^12421212122 is an apocalyptic number.

12421212122 is a deficient number, since it is larger than the sum of its proper divisors (8681552422).

12421212122 is a wasteful number, since it uses less digits than its factorization.

12421212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105494.

The product of its digits is 256, while the sum is 20.

Adding to 12421212122 its reverse (22121212421), we get a palindrome (34542424543).

The spelling of 12421212122 in words is "twelve billion, four hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".