21412133321 has 4 divisors (see below), whose sum is σ = 21415187472. Its totient is φ = 21409079172.

The previous prime is 21412133317. The next prime is 21412133363. The reversal of 21412133321 is 12333121412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21412133321 - 2² = 21412133317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412133381) 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, 1516535 + ... + 1530588.

It is an arithmetic number, because the mean of its divisors is an integer number (5353796868).

Almost surely, 2^21412133321 is an apocalyptic number.

It is an amenable number.

21412133321 is a deficient number, since it is larger than the sum of its proper divisors (3054151).

21412133321 is an equidigital number, since it uses as much as digits as its factorization.

21412133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054150.

The product of its digits is 864, while the sum is 23.

Adding to 21412133321 its reverse (12333121412), we get a palindrome (33745254733).

The spelling of 21412133321 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-three thousand, three hundred twenty-one".