121331223 has 16 divisors (see below), whose sum is σ = 193577440. Its totient is φ = 74665152.

The previous prime is 121331213. The next prime is 121331239. The reversal of 121331223 is 322133121.

It is not a de Polignac number, because 121331223 - 2⁵ = 121331191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121331196 and 121331205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172486 + ... + 173187.

It is an arithmetic number, because the mean of its divisors is an integer number (12098590).

Almost surely, 2^121331223 is an apocalyptic number.

121331223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121331223 is a deficient number, since it is larger than the sum of its proper divisors (72246217).

121331223 is a wasteful number, since it uses less digits than its factorization.

121331223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345695 (or 345689 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 121331223 is about 11015.0453017679. The cubic root of 121331223 is about 495.0596438691.

Adding to 121331223 its reverse (322133121), we get a palindrome (443464344).

The spelling of 121331223 in words is "one hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-three".