121230121223 has 4 divisors (see below), whose sum is σ = 122342324280. Its totient is φ = 120117918168.

The previous prime is 121230121163. The next prime is 121230121247. The reversal of 121230121223 is 322121032121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322121032121 = 7 ⋅46017290303.

It is a cyclic number.

It is not a de Polignac number, because 121230121223 - 2¹⁰ = 121230120199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121230121195 and 121230121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121230121253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556101365 + ... + 556101582.

It is an arithmetic number, because the mean of its divisors is an integer number (30585581070).

Almost surely, 2^121230121223 is an apocalyptic number.

121230121223 is a deficient number, since it is larger than the sum of its proper divisors (1112203057).

121230121223 is a wasteful number, since it uses less digits than its factorization.

121230121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112203056.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121230121223 its reverse (322121032121), we get a palindrome (443351153344).

The spelling of 121230121223 in words is "one hundred twenty-one billion, two hundred thirty million, one hundred twenty-one thousand, two hundred twenty-three".