91013210203 has 4 divisors (see below), whose sum is σ = 91016116840. Its totient is φ = 91010303568.

The previous prime is 91013210191. The next prime is 91013210209. The reversal of 91013210203 is 30201231019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91013210203 - 2³³ = 82423275611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91013210209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405833 + ... + 1469146.

It is an arithmetic number, because the mean of its divisors is an integer number (22754029210).

Almost surely, 2^91013210203 is an apocalyptic number.

91013210203 is a deficient number, since it is larger than the sum of its proper divisors (2906637).

91013210203 is a wasteful number, since it uses less digits than its factorization.

91013210203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906636.

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

The spelling of 91013210203 in words is "ninety-one billion, thirteen million, two hundred ten thousand, two hundred three".