21202110001 has 8 divisors (see below), whose sum is σ = 21582435680. Its totient is φ = 20823663168.

The previous prime is 21202109959. The next prime is 21202110019. The reversal of 21202110001 is 10001120212.

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 21202110001 - 2²⁷ = 21067892273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21202110001.

It is not an unprimeable number, because it can be changed into a prime (21202110701) 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, 446931 + ... + 492088.

It is an arithmetic number, because the mean of its divisors is an integer number (2697804460).

Almost surely, 2^21202110001 is an apocalyptic number.

It is an amenable number.

21202110001 is a deficient number, since it is larger than the sum of its proper divisors (380325679).

21202110001 is an equidigital number, since it uses as much as digits as its factorization.

21202110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939423.

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

Adding to 21202110001 its reverse (10001120212), we get a palindrome (31203230213).

The spelling of 21202110001 in words is "twenty-one billion, two hundred two million, one hundred ten thousand, one".