100112010101891 has 2 divisors, whose sum is σ = 100112010101892. Its totient is φ = 100112010101890.

The previous prime is 100112010101867. The next prime is 100112010101927. The reversal of 100112010101891 is 198101010211001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100112010101891 is a prime.

It is a super-2 number, since 2×100112010101891² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100112010101891.

It is not a weakly prime, because it can be changed into another prime (100112010101291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50056005050945 + 50056005050946.

It is an arithmetic number, because the mean of its divisors is an integer number (50056005050946).

Almost surely, 2^{100112010101891} is an apocalyptic number.

100112010101891 is a deficient number, since it is larger than the sum of its proper divisors (1).

100112010101891 is an equidigital number, since it uses as much as digits as its factorization.

100112010101891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 26.

Adding to 100112010101891 its reverse (198101010211001), we get a palindrome (298213020312892).

The spelling of 100112010101891 in words is "one hundred trillion, one hundred twelve billion, ten million, one hundred one thousand, eight hundred ninety-one".