201331010891 has 2 divisors, whose sum is σ = 201331010892. Its totient is φ = 201331010890.

The previous prime is 201331010857. The next prime is 201331011023. The reversal of 201331010891 is 198010133102.

201331010891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201331010891 is a prime.

It is a super-3 number, since 3×201331010891³ (a number of 35 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 (201331010291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665505445 + 100665505446.

It is an arithmetic number, because the mean of its divisors is an integer number (100665505446).

Almost surely, 2^201331010891 is an apocalyptic number.

201331010891 is a deficient number, since it is larger than the sum of its proper divisors (1).

201331010891 is an equidigital number, since it uses as much as digits as its factorization.

201331010891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

Adding to 201331010891 its reverse (198010133102), we get a palindrome (399341143993).

The spelling of 201331010891 in words is "two hundred one billion, three hundred thirty-one million, ten thousand, eight hundred ninety-one".