121212212222 has 8 divisors (see below), whose sum is σ = 187683425472. Its totient is φ = 58651070400.

The previous prime is 121212212197. The next prime is 121212212257. The reversal of 121212212222 is 222212212121.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121212212194 and 121212212203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977517779 + ... + 977517902.

It is an arithmetic number, because the mean of its divisors is an integer number (23460428184).

Almost surely, 2^121212212222 is an apocalyptic number.

121212212222 is a deficient number, since it is larger than the sum of its proper divisors (66471213250).

121212212222 is a wasteful number, since it uses less digits than its factorization.

121212212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955035714.

The product of its digits is 256, while the sum is 20.

Adding to 121212212222 its reverse (222212212121), we get a palindrome (343424424343).

The spelling of 121212212222 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-two".