12121012222 has 32 divisors (see below), whose sum is σ = 20313151488. Its totient is φ = 5378100000.

The previous prime is 12121012201. The next prime is 12121012279. The reversal of 12121012222 is 22221012121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12121012196 and 12121012205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119347 + ... + 196177.

It is an arithmetic number, because the mean of its divisors is an integer number (634785984).

Almost surely, 2^12121012222 is an apocalyptic number.

12121012222 is a deficient number, since it is larger than the sum of its proper divisors (8192139266).

12121012222 is a wasteful number, since it uses less digits than its factorization.

12121012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77016.

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

Adding to 12121012222 its reverse (22221012121), we get a palindrome (34342024343).

The spelling of 12121012222 in words is "twelve billion, one hundred twenty-one million, twelve thousand, two hundred twenty-two".