121442123 has 16 divisors (see below), whose sum is σ = 137773440. Its totient is φ = 106075200.

The previous prime is 121442107. The next prime is 121442149. The reversal of 121442123 is 321244121.

It is not a de Polignac number, because 121442123 - 2⁴ = 121442107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121442095 and 121442104.

It is not an unprimeable number, because it can be changed into a prime (121442173) 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, 28208 + ... + 32226.

It is an arithmetic number, because the mean of its divisors is an integer number (8610840).

Almost surely, 2^121442123 is an apocalyptic number.

121442123 is a deficient number, since it is larger than the sum of its proper divisors (16331317).

121442123 is a wasteful number, since it uses less digits than its factorization.

121442123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138.

The product of its digits is 384, while the sum is 20.

The square root of 121442123 is about 11020.0781757663. The cubic root of 121442123 is about 495.2104305457.

Adding to 121442123 its reverse (321244121), we get a palindrome (442686244).

It can be divided in two parts, 121 and 442123, that added together give a palindrome (442244).

The spelling of 121442123 in words is "one hundred twenty-one million, four hundred forty-two thousand, one hundred twenty-three".