201021130231291 has 2 divisors, whose sum is σ = 201021130231292. Its totient is φ = 201021130231290.

The previous prime is 201021130231223. The next prime is 201021130231309. The reversal of 201021130231291 is 192132031120102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021130231291 is a prime.

It is a super-2 number, since 2×201021130231291² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201021130231391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510565115645 + 100510565115646.

It is an arithmetic number, because the mean of its divisors is an integer number (100510565115646).

Almost surely, 2^{201021130231291} is an apocalyptic number.

201021130231291 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021130231291 is an equidigital number, since it uses as much as digits as its factorization.

201021130231291 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 28.

Adding to 201021130231291 its reverse (192132031120102), we get a palindrome (393153161351393).

The spelling of 201021130231291 in words is "two hundred one trillion, twenty-one billion, one hundred thirty million, two hundred thirty-one thousand, two hundred ninety-one".