121220233 has 4 divisors (see below), whose sum is σ = 122023168. Its totient is φ = 120417300.

The previous prime is 121220213. The next prime is 121220243. The reversal of 121220233 is 332022121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121220233 - 2⁵ = 121220201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220213) 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, 401241 + ... + 401542.

It is an arithmetic number, because the mean of its divisors is an integer number (30505792).

Almost surely, 2^121220233 is an apocalyptic number.

It is an amenable number.

121220233 is a deficient number, since it is larger than the sum of its proper divisors (802935).

121220233 is an equidigital number, since it uses as much as digits as its factorization.

121220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802934.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 121220233 is about 11010.0060399620. The cubic root of 121220233 is about 494.9086428007.

Adding to 121220233 its reverse (332022121), we get a palindrome (453242354).

The spelling of 121220233 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred thirty-three".