121220112223 has 16 divisors (see below), whose sum is σ = 141955559424. Its totient is φ = 101340642240.

The previous prime is 121220112197. The next prime is 121220112239. The reversal of 121220112223 is 322211022121.

It is a cyclic number.

It is not a de Polignac number, because 121220112223 - 2²¹ = 121218015071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121220112223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220118223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012986 + ... + 1126312.

It is an arithmetic number, because the mean of its divisors is an integer number (8872222464).

Almost surely, 2^121220112223 is an apocalyptic number.

121220112223 is a deficient number, since it is larger than the sum of its proper divisors (20735447201).

121220112223 is a wasteful number, since it uses less digits than its factorization.

121220112223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117102.

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

Adding to 121220112223 its reverse (322211022121), we get a palindrome (443431134344).

The spelling of 121220112223 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty-three".