312120203 has 2 divisors, whose sum is σ = 312120204. Its totient is φ = 312120202.

The previous prime is 312120173. The next prime is 312120217. The reversal of 312120203 is 302021213.

It is a happy number.

It is an a-pointer prime, because the next prime (312120217) can be obtained adding 312120203 to its sum of digits (14).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312120203 - 2⁶ = 312120139 is a prime.

It is a super-3 number, since 3×312120203³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (312120253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060101 + 156060102.

It is an arithmetic number, because the mean of its divisors is an integer number (156060102).

Almost surely, 2^312120203 is an apocalyptic number.

312120203 is a deficient number, since it is larger than the sum of its proper divisors (1).

312120203 is an equidigital number, since it uses as much as digits as its factorization.

312120203 is an evil number, because the sum of its binary digits is even.

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

The square root of 312120203 is about 17666.9239824028. The cubic root of 312120203 is about 678.3293786565.

Adding to 312120203 its reverse (302021213), we get a palindrome (614141416).

The spelling of 312120203 in words is "three hundred twelve million, one hundred twenty thousand, two hundred three".