100009901 has 4 divisors (see below), whose sum is σ = 105273600. Its totient is φ = 94746204.

The previous prime is 100009883. The next prime is 100009913. The reversal of 100009901 is 109900001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109900001 = 1549 ⋅70949.

It is a cyclic number.

It is not a de Polignac number, because 100009901 - 2⁶ = 100009837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100009201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2631821 + ... + 2631858.

It is an arithmetic number, because the mean of its divisors is an integer number (26318400).

Almost surely, 2^100009901 is an apocalyptic number.

It is an amenable number.

100009901 is a deficient number, since it is larger than the sum of its proper divisors (5263699).

100009901 is an equidigital number, since it uses as much as digits as its factorization.

100009901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263698.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 100009901 is about 10000.4950377469. The cubic root of 100009901 is about 464.1742016461.

Adding to 100009901 its reverse (109900001), we get a palindrome (209909902).

The spelling of 100009901 in words is "one hundred million, nine thousand, nine hundred one".