203011213291 has 2 divisors, whose sum is σ = 203011213292. Its totient is φ = 203011213290.

The previous prime is 203011213289. The next prime is 203011213331. The reversal of 203011213291 is 192312110302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203011213291 - 2¹ = 203011213289 is a prime.

Together with 203011213289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (203011213231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101505606645 + 101505606646.

It is an arithmetic number, because the mean of its divisors is an integer number (101505606646).

Almost surely, 2^203011213291 is an apocalyptic number.

203011213291 is a deficient number, since it is larger than the sum of its proper divisors (1).

203011213291 is an equidigital number, since it uses as much as digits as its factorization.

203011213291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 203011213291 its reverse (192312110302), we get a palindrome (395323323593).

The spelling of 203011213291 in words is "two hundred three billion, eleven million, two hundred thirteen thousand, two hundred ninety-one".