121320203 has 2 divisors, whose sum is σ = 121320204. Its totient is φ = 121320202.

The previous prime is 121320197. The next prime is 121320223. The reversal of 121320203 is 302023121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121320203 is a prime.

It is a super-2 number, since 2×121320203² = 29437183311922418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121320223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660101 + 60660102.

It is an arithmetic number, because the mean of its divisors is an integer number (60660102).

Almost surely, 2^121320203 is an apocalyptic number.

121320203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121320203 is an equidigital number, since it uses as much as digits as its factorization.

121320203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 121320203 is about 11014.5450655032. The cubic root of 121320203 is about 495.0446553599.

Adding to 121320203 its reverse (302023121), we get a palindrome (423343324).

The spelling of 121320203 in words is "one hundred twenty-one million, three hundred twenty thousand, two hundred three".