121211202223 has 16 divisors (see below), whose sum is σ = 128697323040. Its totient is φ = 113765068800.

The previous prime is 121211202197. The next prime is 121211202227. The reversal of 121211202223 is 322202112121.

It is a cyclic number.

It is not a de Polignac number, because 121211202223 - 2¹³ = 121211194031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121211202223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211202227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10370943 + ... + 10382623.

It is an arithmetic number, because the mean of its divisors is an integer number (8043582690).

Almost surely, 2^121211202223 is an apocalyptic number.

121211202223 is a deficient number, since it is larger than the sum of its proper divisors (7486120817).

121211202223 is a wasteful number, since it uses less digits than its factorization.

121211202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13338.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121211202223 its reverse (322202112121), we get a palindrome (443413314344).

The spelling of 121211202223 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred two thousand, two hundred twenty-three".