21303341434221 has 32 divisors (see below), whose sum is σ = 35413583428608. Its totient is φ = 11066596928640.

The previous prime is 21303341434217. The next prime is 21303341434223. The reversal of 21303341434221 is 12243414330312.

It is not a de Polignac number, because 21303341434221 - 2² = 21303341434217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303341434223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58969086 + ... + 59329248.

It is an arithmetic number, because the mean of its divisors is an integer number (1106674482144).

Almost surely, 2^{21303341434221} is an apocalyptic number.

21303341434221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21303341434221 is a deficient number, since it is larger than the sum of its proper divisors (14110241994387).

21303341434221 is a wasteful number, since it uses less digits than its factorization.

21303341434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616241.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 21303341434221 its reverse (12243414330312), we get a palindrome (33546755764533).

The spelling of 21303341434221 in words is "twenty-one trillion, three hundred three billion, three hundred forty-one million, four hundred thirty-four thousand, two hundred twenty-one".