21303133302121 has 8 divisors (see below), whose sum is σ = 23239841553504. Its totient is φ = 19366435012320.

The previous prime is 21303133302119. The next prime is 21303133302151. The reversal of 21303133302121 is 12120333130312.

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

It is not a de Polignac number, because 21303133302121 - 2¹ = 21303133302119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303133302151) 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, 2398341 + ... + 6954013.

It is an arithmetic number, because the mean of its divisors is an integer number (2904980194188).

Almost surely, 2^{21303133302121} is an apocalyptic number.

It is an amenable number.

21303133302121 is a deficient number, since it is larger than the sum of its proper divisors (1936708251383).

21303133302121 is a wasteful number, since it uses less digits than its factorization.

21303133302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980791.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21303133302121 its reverse (12120333130312), we get a palindrome (33423466432433).

The spelling of 21303133302121 in words is "twenty-one trillion, three hundred three billion, one hundred thirty-three million, three hundred two thousand, one hundred twenty-one".