121212222021222 has 8 divisors (see below), whose sum is σ = 242424444042456. Its totient is φ = 40404074007072.

The previous prime is 121212222021221. The next prime is 121212222021239. The reversal of 121212222021222 is 222120222212121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

121212222021222 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 121212222021192 and 121212222021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212222021221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10101018501763 + ... + 10101018501774.

It is an arithmetic number, because the mean of its divisors is an integer number (30303055505307).

Almost surely, 2^{121212222021222} is an apocalyptic number.

121212222021222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121212222021222 is a wasteful number, since it uses less digits than its factorization.

121212222021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20202037003542.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 121212222021222 its reverse (222120222212121), we get a palindrome (343332444233343).

The spelling of 121212222021222 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-two".