121212233 has 4 divisors (see below), whose sum is σ = 121234560. Its totient is φ = 121189908.

The previous prime is 121212209. The next prime is 121212253. The reversal of 121212233 is 332212121.

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: 332212121 = 47 ⋅7068343.

It is a cyclic number.

It is not a de Polignac number, because 121212233 - 2⁸ = 121211977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212253) 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, 2816 + ... + 15822.

It is an arithmetic number, because the mean of its divisors is an integer number (30308640).

Almost surely, 2^121212233 is an apocalyptic number.

It is an amenable number.

121212233 is a deficient number, since it is larger than the sum of its proper divisors (22327).

121212233 is an equidigital number, since it uses as much as digits as its factorization.

121212233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22326.

The product of its digits is 144, while the sum is 17.

The square root of 121212233 is about 11009.6427280816. The cubic root of 121212233 is about 494.8977552997.

Adding to 121212233 its reverse (332212121), we get a palindrome (453424354).

The spelling of 121212233 in words is "one hundred twenty-one million, two hundred twelve thousand, two hundred thirty-three".