121221120222 has 96 divisors (see below), whose sum is σ = 269429752800. Its totient is φ = 39376606464.

The previous prime is 121221120203. The next prime is 121221120233. The reversal of 121221120222 is 222021122121.

It is a happy number.

121221120222 is a `hidden beast` number, since 1 + 212 + 211 + 20 + 222 = 666.

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 = 121221120195 and 121221120204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138222048 + ... + 138222924.

It is an arithmetic number, because the mean of its divisors is an integer number (2806559925).

Almost surely, 2^121221120222 is an apocalyptic number.

121221120222 is an abundant number, since it is smaller than the sum of its proper divisors (148208632578).

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

121221120222 is a wasteful number, since it uses less digits than its factorization.

121221120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930 (or 1927 counting only the distinct ones).

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

Adding to 121221120222 its reverse (222021122121), we get a palindrome (343242242343).

The spelling of 121221120222 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-two".