100012001 has 8 divisors (see below), whose sum is σ = 101821608. Its totient is φ = 98208000.

The previous prime is 100011979. The next prime is 100012019. The reversal of 100012001 is 100210001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19891600 + 80120401 = 4460^2 + 8951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100012001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100012301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52811 + ... + 54671.

It is an arithmetic number, because the mean of its divisors is an integer number (12727701).

Almost surely, 2^100012001 is an apocalyptic number.

It is an amenable number.

100012001 is a deficient number, since it is larger than the sum of its proper divisors (1809607).

100012001 is an equidigital number, since it uses as much as digits as its factorization.

100012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 100012001 is about 10000.6000319981. The cubic root of 100012001 is about 464.1774505211.

Adding to 100012001 its reverse (100210001), we get a palindrome (200222002).

The spelling of 100012001 in words is "one hundred million, twelve thousand, one".