21321422133 has 8 divisors (see below), whose sum is σ = 31012977696. Its totient is φ = 12922074000.

The previous prime is 21321422081. The next prime is 21321422153. The reversal of 21321422133 is 33122412312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21321422133 - 2⁹ = 21321421621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321422153) 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, 323051818 + ... + 323051883.

It is an arithmetic number, because the mean of its divisors is an integer number (3876622212).

Almost surely, 2^21321422133 is an apocalyptic number.

It is an amenable number.

21321422133 is a deficient number, since it is larger than the sum of its proper divisors (9691555563).

21321422133 is a wasteful number, since it uses less digits than its factorization.

21321422133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646103715.

The product of its digits is 1728, while the sum is 24.

Adding to 21321422133 its reverse (33122412312), we get a palindrome (54443834445).

The spelling of 21321422133 in words is "twenty-one billion, three hundred twenty-one million, four hundred twenty-two thousand, one hundred thirty-three".