121331233 has 4 divisors (see below), whose sum is σ = 126606528. Its totient is φ = 116055940.

The previous prime is 121331213. The next prime is 121331239. The reversal of 121331233 is 332133121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332133121 = 193 ⋅1720897.

It is a cyclic number.

It is not a de Polignac number, because 121331233 - 2⁹ = 121330721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121331233.

It is not an unprimeable number, because it can be changed into a prime (121331239) 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, 2637613 + ... + 2637658.

It is an arithmetic number, because the mean of its divisors is an integer number (31651632).

Almost surely, 2^121331233 is an apocalyptic number.

It is an amenable number.

121331233 is a deficient number, since it is larger than the sum of its proper divisors (5275295).

121331233 is an equidigital number, since it uses as much as digits as its factorization.

121331233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275294.

The product of its digits is 324, while the sum is 19.

The square root of 121331233 is about 11015.0457556925. The cubic root of 121331233 is about 495.0596574699.

Adding to 121331233 its reverse (332133121), we get a palindrome (453464354).

It can be divided in two parts, 12133 and 1233, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 121331233 in words is "one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-three".