121222123 has 4 divisors (see below), whose sum is σ = 132242328. Its totient is φ = 110201920.

The previous prime is 121222099. The next prime is 121222133. The reversal of 121222123 is 321222121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321222121 = 11 ⋅29202011.

It is a cyclic number.

It is not a de Polignac number, because 121222123 - 2⁵ = 121222091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222097 and 121222106.

It is not an unprimeable number, because it can be changed into a prime (121222133) 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, 5510086 + ... + 5510107.

It is an arithmetic number, because the mean of its divisors is an integer number (33060582).

Almost surely, 2^121222123 is an apocalyptic number.

121222123 is a deficient number, since it is larger than the sum of its proper divisors (11020205).

121222123 is a wasteful number, since it uses less digits than its factorization.

121222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020204.

The product of its digits is 96, while the sum is 16.

The square root of 121222123 is about 11010.0918706430. The cubic root of 121222123 is about 494.9112149029.

Adding to 121222123 its reverse (321222121), we get a palindrome (442444244).

The spelling of 121222123 in words is "one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-three".