100990100001 has 24 divisors (see below), whose sum is σ = 156792564864. Its totient is φ = 57651575520.

The previous prime is 100990099997. The next prime is 100990100009. The reversal of 100990100001 is 100001099001.

It is not a de Polignac number, because 100990100001 - 2² = 100990099997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (100990100009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190185 + ... + 488006.

It is an arithmetic number, because the mean of its divisors is an integer number (6533023536).

Almost surely, 2^100990100001 is an apocalyptic number.

It is an amenable number.

100990100001 is a deficient number, since it is larger than the sum of its proper divisors (55802464863).

100990100001 is a wasteful number, since it uses less digits than its factorization.

100990100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679221 (or 679214 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 21.

Adding to 100990100001 its reverse (100001099001), we get a palindrome (200991199002).

The spelling of 100990100001 in words is "one hundred billion, nine hundred ninety million, one hundred thousand, one".