21210202110001 has 8 divisors (see below), whose sum is σ = 21457259939808. Its totient is φ = 20964434400000.

The previous prime is 21210202109981. The next prime is 21210202110007. The reversal of 21210202110001 is 10001120201212.

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-21210202110001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210202110007) 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, 322496880 + ... + 322562641.

It is an arithmetic number, because the mean of its divisors is an integer number (2682157492476).

Almost surely, 2^{21210202110001} is an apocalyptic number.

It is an amenable number.

21210202110001 is a deficient number, since it is larger than the sum of its proper divisors (247057829807).

21210202110001 is a wasteful number, since it uses less digits than its factorization.

21210202110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645059903.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210202110001 its reverse (10001120201212), we get a palindrome (31211322311213).

The spelling of 21210202110001 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, one hundred ten thousand, one".