21024325211 has 4 divisors (see below), whose sum is σ = 21131047872. Its totient is φ = 20917602552.

The previous prime is 21024325123. The next prime is 21024325297. The reversal of 21024325211 is 11252342012.

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 21024325211 - 2¹⁰ = 21024324187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21024325411) 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, 53361035 + ... + 53361428.

It is an arithmetic number, because the mean of its divisors is an integer number (5282761968).

Almost surely, 2^21024325211 is an apocalyptic number.

21024325211 is a deficient number, since it is larger than the sum of its proper divisors (106722661).

21024325211 is a wasteful number, since it uses less digits than its factorization.

21024325211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106722660.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21024325211 its reverse (11252342012), we get a palindrome (32276667223).

The spelling of 21024325211 in words is "twenty-one billion, twenty-four million, three hundred twenty-five thousand, two hundred eleven".