203100012391 has 2 divisors, whose sum is σ = 203100012392. Its totient is φ = 203100012390.

The previous prime is 203100012287. The next prime is 203100012421. The reversal of 203100012391 is 193210001302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203100012391 - 2⁹ = 203100011879 is a prime.

It is a super-3 number, since 3×203100012391³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203107012391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101550006195 + 101550006196.

It is an arithmetic number, because the mean of its divisors is an integer number (101550006196).

Almost surely, 2^203100012391 is an apocalyptic number.

203100012391 is a deficient number, since it is larger than the sum of its proper divisors (1).

203100012391 is an equidigital number, since it uses as much as digits as its factorization.

203100012391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 203100012391 its reverse (193210001302), we get a palindrome (396310013693).

The spelling of 203100012391 in words is "two hundred three billion, one hundred million, twelve thousand, three hundred ninety-one".