121211222222 has 16 divisors (see below), whose sum is σ = 188170138800. Its totient is φ = 58489704000.

The previous prime is 121211222207. The next prime is 121211222261. The reversal of 121211222222 is 222222112121.

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 = 121211222194 and 121211222203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333647 + ... + 594762.

It is an arithmetic number, because the mean of its divisors is an integer number (11760633675).

Almost surely, 2^121211222222 is an apocalyptic number.

121211222222 is a deficient number, since it is larger than the sum of its proper divisors (66958916578).

121211222222 is a wasteful number, since it uses less digits than its factorization.

121211222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930691.

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

Adding to 121211222222 its reverse (222222112121), we get a palindrome (343433334343).

The spelling of 121211222222 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".