121112223 has 4 divisors (see below), whose sum is σ = 161482968. Its totient is φ = 80741480.

The previous prime is 121112203. The next prime is 121112263. The reversal of 121112223 is 322211121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322211121 = 3 ⋅107403707.

It is a cyclic number.

It is not a de Polignac number, because 121112223 - 2⁸ = 121111967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112203) 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, 20185368 + ... + 20185373.

It is an arithmetic number, because the mean of its divisors is an integer number (40370742).

Almost surely, 2^121112223 is an apocalyptic number.

121112223 is a deficient number, since it is larger than the sum of its proper divisors (40370745).

121112223 is an equidigital number, since it uses as much as digits as its factorization.

121112223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40370744.

The product of its digits is 48, while the sum is 15.

The square root of 121112223 is about 11005.0998632452. The cubic root of 121112223 is about 494.7616074816.

Adding to 121112223 its reverse (322211121), we get a palindrome (443323344).

The spelling of 121112223 in words is "one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-three".