100021000001 has 16 divisors (see below), whose sum is σ = 113555355648. Its totient is φ = 87447729600.

The previous prime is 100020999989. The next prime is 100021000003. The reversal of 100021000001 is 100000120001.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100021000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021000003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621390 + ... + 2659271.

It is an arithmetic number, because the mean of its divisors is an integer number (7097209728).

Almost surely, 2^100021000001 is an apocalyptic number.

It is an amenable number.

100021000001 is a deficient number, since it is larger than the sum of its proper divisors (13534355647).

100021000001 is a wasteful number, since it uses less digits than its factorization.

100021000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280752.

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

Adding to 100021000001 its reverse (100000120001), we get a palindrome (200021120002).

The spelling of 100021000001 in words is "one hundred billion, twenty-one million, one", and thus it is an aban number.