121223203 has 2 divisors, whose sum is σ = 121223204. Its totient is φ = 121223202.

The previous prime is 121223197. The next prime is 121223213. The reversal of 121223203 is 302322121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121223203 is a prime.

It is not a weakly prime, because it can be changed into another prime (121223213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611601 + 60611602.

It is an arithmetic number, because the mean of its divisors is an integer number (60611602).

Almost surely, 2^121223203 is an apocalyptic number.

121223203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223203 is an equidigital number, since it uses as much as digits as its factorization.

121223203 is an evil number, because the sum of its binary digits is even.

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

The square root of 121223203 is about 11010.1409164461. The cubic root of 121223203 is about 494.9126846636.

Adding to 121223203 its reverse (302322121), we get a palindrome (423545324).

The spelling of 121223203 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred three".