101201111011691 has 2 divisors, whose sum is σ = 101201111011692. Its totient is φ = 101201111011690.

The previous prime is 101201111011667. The next prime is 101201111011747. The reversal of 101201111011691 is 196110111102101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101201111011691 - 2¹⁴ = 101201110995307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101201111011691.

It is not a weakly prime, because it can be changed into another prime (101201111011621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50600555505845 + 50600555505846.

It is an arithmetic number, because the mean of its divisors is an integer number (50600555505846).

Almost surely, 2^{101201111011691} is an apocalyptic number.

101201111011691 is a deficient number, since it is larger than the sum of its proper divisors (1).

101201111011691 is an equidigital number, since it uses as much as digits as its factorization.

101201111011691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 26.

Adding to 101201111011691 its reverse (196110111102101), we get a palindrome (297311222113792).

The spelling of 101201111011691 in words is "one hundred one trillion, two hundred one billion, one hundred eleven million, eleven thousand, six hundred ninety-one".