100123311986 has 4 divisors (see below), whose sum is σ = 150184967982. Its totient is φ = 50061655992.

The previous prime is 100123311947. The next prime is 100123311989. The reversal of 100123311986 is 689113321001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689113321001 = 7 ⋅98444760143.

It can be written as a sum of positive squares in only one way, i.e., 94729143961 + 5394168025 = 307781^2 + 73445^2 .

It is not an unprimeable number, because it can be changed into a prime (100123311989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25030827995 + ... + 25030827998.

Almost surely, 2^100123311986 is an apocalyptic number.

100123311986 is a deficient number, since it is larger than the sum of its proper divisors (50061655996).

100123311986 is an equidigital number, since it uses as much as digits as its factorization.

100123311986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50061655995.

The product of its (nonzero) digits is 7776, while the sum is 35.

Adding to 100123311986 its reverse (689113321001), we get a palindrome (789236632987).

The spelling of 100123311986 in words is "one hundred billion, one hundred twenty-three million, three hundred eleven thousand, nine hundred eighty-six".