121212201222 has 64 divisors (see below), whose sum is σ = 324042662400. Its totient is φ = 32809315680.

The previous prime is 121212201199. The next prime is 121212201239. The reversal of 121212201222 is 222102212121.

It is a happy number.

121212201222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 121212201195 and 121212201204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8431429 + ... + 8445792.

It is an arithmetic number, because the mean of its divisors is an integer number (5063166600).

Almost surely, 2^121212201222 is an apocalyptic number.

121212201222 is an abundant number, since it is smaller than the sum of its proper divisors (202830461178).

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

121212201222 is a wasteful number, since it uses less digits than its factorization.

121212201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16877258 (or 16877252 counting only the distinct ones).

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

Adding to 121212201222 its reverse (222102212121), we get a palindrome (343314413343).

The spelling of 121212201222 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred one thousand, two hundred twenty-two".