21002211001 has 8 divisors (see below), whose sum is σ = 21352030208. Its totient is φ = 20652570000.

The previous prime is 21002210963. The next prime is 21002211023. The reversal of 21002211001 is 10011220012.

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-21002211001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002211071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204616 + ... + 289606.

It is an arithmetic number, because the mean of its divisors is an integer number (2669003776).

Almost surely, 2^21002211001 is an apocalyptic number.

It is an amenable number.

21002211001 is a deficient number, since it is larger than the sum of its proper divisors (349819207).

21002211001 is an equidigital number, since it uses as much as digits as its factorization.

21002211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89103.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21002211001 its reverse (10011220012), we get a palindrome (31013431013).

The spelling of 21002211001 in words is "twenty-one billion, two million, two hundred eleven thousand, one".