21012010001 has 8 divisors (see below), whose sum is σ = 21998450880. Its totient is φ = 20043028432.

The previous prime is 21012009971. The next prime is 21012010027. The reversal of 21012010001 is 10001021012.

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 21012010001 - 2¹⁰ = 21012008977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012019001) 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, 4362365 + ... + 4367178.

It is an arithmetic number, because the mean of its divisors is an integer number (2749806360).

Almost surely, 2^21012010001 is an apocalyptic number.

It is an amenable number.

21012010001 is a deficient number, since it is larger than the sum of its proper divisors (986440879).

21012010001 is an equidigital number, since it uses as much as digits as its factorization.

21012010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8729655.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21012010001 its reverse (10001021012), we get a palindrome (31013031013).

It can be divided in two parts, 2101 and 2010001, that added together give a palindrome (2012102).

The spelling of 21012010001 in words is "twenty-one billion, twelve million, ten thousand, one".