121442223 has 16 divisors (see below), whose sum is σ = 185296896. Its totient is φ = 69304800.

The previous prime is 121442213. The next prime is 121442263. The reversal of 121442223 is 322244121.

It is not a de Polignac number, because 121442223 - 2⁸ = 121441967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 121442223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442213) 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, 14773 + ... + 21473.

It is an arithmetic number, because the mean of its divisors is an integer number (11581056).

Almost surely, 2^121442223 is an apocalyptic number.

121442223 is a deficient number, since it is larger than the sum of its proper divisors (63854673).

121442223 is an equidigital number, since it uses as much as digits as its factorization.

121442223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574.

The product of its digits is 768, while the sum is 21.

The square root of 121442223 is about 11020.0827129382. The cubic root of 121442223 is about 495.2105664706.

Adding to 121442223 its reverse (322244121), we get a palindrome (443686344).

The spelling of 121442223 in words is "one hundred twenty-one million, four hundred forty-two thousand, two hundred twenty-three".