21103002321211 has 4 divisors (see below), whose sum is σ = 21103637546992. Its totient is φ = 21102367095432.

The previous prime is 21103002321199. The next prime is 21103002321259. The reversal of 21103002321211 is 11212320030112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21103002321211 - 2⁴¹ = 18903979065659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103002321911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317563056 + ... + 317629501.

It is an arithmetic number, because the mean of its divisors is an integer number (5275909386748).

Almost surely, 2^{21103002321211} is an apocalyptic number.

21103002321211 is a deficient number, since it is larger than the sum of its proper divisors (635225781).

21103002321211 is an equidigital number, since it uses as much as digits as its factorization.

21103002321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635225780.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21103002321211 its reverse (11212320030112), we get a palindrome (32315322351323).

The spelling of 21103002321211 in words is "twenty-one trillion, one hundred three billion, two million, three hundred twenty-one thousand, two hundred eleven".