201111110021291 has 2 divisors, whose sum is σ = 201111110021292. Its totient is φ = 201111110021290.

The previous prime is 201111110021131. The next prime is 201111110021317. The reversal of 201111110021291 is 192120011111102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201111110021291 is a prime.

It is not a weakly prime, because it can be changed into another prime (201111110081291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555555010645 + 100555555010646.

It is an arithmetic number, because the mean of its divisors is an integer number (100555555010646).

Almost surely, 2^{201111110021291} is an apocalyptic number.

201111110021291 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111110021291 is an equidigital number, since it uses as much as digits as its factorization.

201111110021291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 23.

Adding to 201111110021291 its reverse (192120011111102), we get a palindrome (393231121132393).

The spelling of 201111110021291 in words is "two hundred one trillion, one hundred eleven billion, one hundred ten million, twenty-one thousand, two hundred ninety-one".