210101001129991 has 2 divisors, whose sum is σ = 210101001129992. Its totient is φ = 210101001129990.

The previous prime is 210101001129931. The next prime is 210101001130037. The reversal of 210101001129991 is 199921100101012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210101001129991 - 2²¹ = 210100999032839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210101001129991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210101001129931) 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, 105050500564995 + 105050500564996.

It is an arithmetic number, because the mean of its divisors is an integer number (105050500564996).

Almost surely, 2^{210101001129991} is an apocalyptic number.

210101001129991 is a deficient number, since it is larger than the sum of its proper divisors (1).

210101001129991 is an equidigital number, since it uses as much as digits as its factorization.

210101001129991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 37.

The spelling of 210101001129991 in words is "two hundred ten trillion, one hundred one billion, one million, one hundred twenty-nine thousand, nine hundred ninety-one".