21302133121 has 8 divisors (see below), whose sum is σ = 21338553600. Its totient is φ = 21265740048.

The previous prime is 21302133091. The next prime is 21302133133. The reversal of 21302133121 is 12133120312.

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

It is a cyclic number.

It is not a de Polignac number, because 21302133121 - 2⁹ = 21302132609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21302133191) 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, 2043280 + ... + 2053678.

It is an arithmetic number, because the mean of its divisors is an integer number (2667319200).

Almost surely, 2^21302133121 is an apocalyptic number.

It is an amenable number.

21302133121 is a deficient number, since it is larger than the sum of its proper divisors (36420479).

21302133121 is a wasteful number, since it uses less digits than its factorization.

21302133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13703.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21302133121 its reverse (12133120312), we get a palindrome (33435253433).

The spelling of 21302133121 in words is "twenty-one billion, three hundred two million, one hundred thirty-three thousand, one hundred twenty-one".