100231201691 has 2 divisors, whose sum is σ = 100231201692. Its totient is φ = 100231201690.

The previous prime is 100231201667. The next prime is 100231201699. The reversal of 100231201691 is 196102132001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100231201691 - 2⁶ = 100231201627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100231201691.

It is not a weakly prime, because it can be changed into another prime (100231201699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50115600845 + 50115600846.

It is an arithmetic number, because the mean of its divisors is an integer number (50115600846).

Almost surely, 2^100231201691 is an apocalyptic number.

100231201691 is a deficient number, since it is larger than the sum of its proper divisors (1).

100231201691 is an equidigital number, since it uses as much as digits as its factorization.

100231201691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 100231201691 its reverse (196102132001), we get a palindrome (296333333692).

The spelling of 100231201691 in words is "one hundred billion, two hundred thirty-one million, two hundred one thousand, six hundred ninety-one".