121212303 has 4 divisors (see below), whose sum is σ = 161616408. Its totient is φ = 80808200.

The previous prime is 121212281. The next prime is 121212317. The reversal of 121212303 is 303212121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121212303 - 2²⁰ = 120163727 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212383) 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, 20202048 + ... + 20202053.

It is an arithmetic number, because the mean of its divisors is an integer number (40404102).

Almost surely, 2^121212303 is an apocalyptic number.

121212303 is a deficient number, since it is larger than the sum of its proper divisors (40404105).

121212303 is an equidigital number, since it uses as much as digits as its factorization.

121212303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40404104.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121212303 is about 11009.6459071125. The cubic root of 121212303 is about 494.8978505674.

Adding to 121212303 its reverse (303212121), we get a palindrome (424424424).

The spelling of 121212303 in words is "one hundred twenty-one million, two hundred twelve thousand, three hundred three".