10001000921 has 8 divisors (see below), whose sum is σ = 10561561920. Its totient is φ = 9450917872.

The previous prime is 10001000917. The next prime is 10001000927. The reversal of 10001000921 is 12900010001.

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

It is a cyclic number.

It is not a de Polignac number, because 10001000921 - 2² = 10001000917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001000896 and 10001000905.

It is not an unprimeable number, because it can be changed into a prime (10001000927) 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, 2617526 + ... + 2621343.

It is an arithmetic number, because the mean of its divisors is an integer number (1320195240).

Almost surely, 2^10001000921 is an apocalyptic number.

It is an amenable number.

10001000921 is a deficient number, since it is larger than the sum of its proper divisors (560560999).

10001000921 is an equidigital number, since it uses as much as digits as its factorization.

10001000921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238975.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 10001000921 its reverse (12900010001), we get a palindrome (22901010922).

The spelling of 10001000921 in words is "ten billion, one million, nine hundred twenty-one", and thus it is an aban number.