12021212122 has 16 divisors (see below), whose sum is σ = 18365901120. Its totient is φ = 5899561408.

The previous prime is 12021212029. The next prime is 12021212141. The reversal of 12021212122 is 22121212021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12021212096 and 12021212105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2383 + ... + 155074.

It is an arithmetic number, because the mean of its divisors is an integer number (1147868820).

Almost surely, 2^12021212122 is an apocalyptic number.

12021212122 is a deficient number, since it is larger than the sum of its proper divisors (6344688998).

12021212122 is a wasteful number, since it uses less digits than its factorization.

12021212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158165.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12021212122 its reverse (22121212021), we get a palindrome (34142424143).

The spelling of 12021212122 in words is "twelve billion, twenty-one million, two hundred twelve thousand, one hundred twenty-two".