121233213 has 8 divisors (see below), whose sum is σ = 179604800. Its totient is φ = 80822124.

The previous prime is 121233199. The next prime is 121233221. The reversal of 121233213 is 312332121.

It is not a de Polignac number, because 121233213 - 2⁴ = 121233197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121233263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245033 + ... + 2245086.

It is an arithmetic number, because the mean of its divisors is an integer number (22450600).

Almost surely, 2^121233213 is an apocalyptic number.

It is an amenable number.

121233213 is a deficient number, since it is larger than the sum of its proper divisors (58371587).

121233213 is an equidigital number, since it uses as much as digits as its factorization.

121233213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490128 (or 4490122 counting only the distinct ones).

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

The square root of 121233213 is about 11010.5954879834. The cubic root of 121233213 is about 494.9263067521.

Adding to 121233213 its reverse (312332121), we get a palindrome (433565334).

The spelling of 121233213 in words is "one hundred twenty-one million, two hundred thirty-three thousand, two hundred thirteen".