21024111321 has 12 divisors (see below), whose sum is σ = 30371980080. Its totient is φ = 14014311480.

The previous prime is 21024111307. The next prime is 21024111347. The reversal of 21024111321 is 12311142012.

21024111321 is a `hidden beast` number, since 210 + 24 + 111 + 321 = 666.

It is not a de Polignac number, because 21024111321 - 2¹⁴ = 21024094937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21024111294 and 21024111303.

It is not an unprimeable number, because it can be changed into a prime (21024112321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69195 + ... + 216416.

It is an arithmetic number, because the mean of its divisors is an integer number (2530998340).

Almost surely, 2^21024111321 is an apocalyptic number.

It is an amenable number.

21024111321 is a deficient number, since it is larger than the sum of its proper divisors (9347868759).

21024111321 is a wasteful number, since it uses less digits than its factorization.

21024111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293796 (or 293793 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21024111321 its reverse (12311142012), we get a palindrome (33335253333).

The spelling of 21024111321 in words is "twenty-one billion, twenty-four million, one hundred eleven thousand, three hundred twenty-one".