21302351343321 has 8 divisors (see below), whose sum is σ = 29007457148544. Its totient is φ = 13899406550160.

The previous prime is 21302351343307. The next prime is 21302351343337. The reversal of 21302351343321 is 12334315320312.

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

It is not a de Polignac number, because 21302351343321 - 2¹⁵ = 21302351310553 is a prime.

It is a super-2 number, since 2×21302351343321² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21302351383321) 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, 75540252850 + ... + 75540253131.

It is an arithmetic number, because the mean of its divisors is an integer number (3625932143568).

Almost surely, 2^{21302351343321} is an apocalyptic number.

It is an amenable number.

21302351343321 is a deficient number, since it is larger than the sum of its proper divisors (7705105805223).

21302351343321 is a wasteful number, since it uses less digits than its factorization.

21302351343321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151080506031.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 21302351343321 its reverse (12334315320312), we get a palindrome (33636666663633).

The spelling of 21302351343321 in words is "twenty-one trillion, three hundred two billion, three hundred fifty-one million, three hundred forty-three thousand, three hundred twenty-one".