203533212991 has 2 divisors, whose sum is σ = 203533212992. Its totient is φ = 203533212990.

The previous prime is 203533212959. The next prime is 203533213001. The reversal of 203533212991 is 199212335302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203533212991 - 2⁵ = 203533212959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203533212901) 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, 101766606495 + 101766606496.

It is an arithmetic number, because the mean of its divisors is an integer number (101766606496).

Almost surely, 2^203533212991 is an apocalyptic number.

203533212991 is a deficient number, since it is larger than the sum of its proper divisors (1).

203533212991 is an equidigital number, since it uses as much as digits as its factorization.

203533212991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 203533212991 in words is "two hundred three billion, five hundred thirty-three million, two hundred twelve thousand, nine hundred ninety-one".