100861771601 has 2 divisors, whose sum is σ = 100861771602. Its totient is φ = 100861771600.

The previous prime is 100861771583. The next prime is 100861771669. The reversal of 100861771601 is 106177168001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59653177600 + 41208594001 = 244240^2 + 202999^2 .

It is an emirp because it is prime and its reverse (106177168001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100861771601 - 2²⁶ = 100794662737 is a prime.

It is not a weakly prime, because it can be changed into another prime (100861771691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50430885800 + 50430885801.

It is an arithmetic number, because the mean of its divisors is an integer number (50430885801).

Almost surely, 2^100861771601 is an apocalyptic number.

It is an amenable number.

100861771601 is a deficient number, since it is larger than the sum of its proper divisors (1).

100861771601 is an equidigital number, since it uses as much as digits as its factorization.

100861771601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 38.

The spelling of 100861771601 in words is "one hundred billion, eight hundred sixty-one million, seven hundred seventy-one thousand, six hundred one".