121212211001222 has 32 divisors (see below), whose sum is σ = 202357655136000. Its totient is φ = 53988464730400.

The previous prime is 121212211001191. The next prime is 121212211001227. The reversal of 121212211001222 is 222100112212121.

It is a junction number, because it is equal to n+sod(n) for n = 121212211001194 and 121212211001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212211001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149731097 + ... + 150538452.

It is an arithmetic number, because the mean of its divisors is an integer number (6323676723000).

Almost surely, 2^{121212211001222} is an apocalyptic number.

121212211001222 is a deficient number, since it is larger than the sum of its proper divisors (81145444134778).

121212211001222 is a wasteful number, since it uses less digits than its factorization.

121212211001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300269932.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121212211001222 its reverse (222100112212121), we get a palindrome (343312323213343).

The spelling of 121212211001222 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred eleven million, one thousand, two hundred twenty-two".