121213233 has 16 divisors (see below), whose sum is σ = 180375360. Its totient is φ = 80448768.

The previous prime is 121213229. The next prime is 121213241. The reversal of 121213233 is 332312121.

It is not a de Polignac number, because 121213233 - 2² = 121213229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121213333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3760 + ... + 16017.

It is an arithmetic number, because the mean of its divisors is an integer number (11273460).

Almost surely, 2^121213233 is an apocalyptic number.

It is an amenable number.

121213233 is a deficient number, since it is larger than the sum of its proper divisors (59162127).

121213233 is a wasteful number, since it uses less digits than its factorization.

121213233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20013 (or 20007 counting only the distinct ones).

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

The square root of 121213233 is about 11009.6881427223. The cubic root of 121213233 is about 494.8991162635.

Adding to 121213233 its reverse (332312121), we get a palindrome (453525354).

The spelling of 121213233 in words is "one hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-three".