21341215231 has 8 divisors (see below), whose sum is σ = 24390846464. Its totient is φ = 18291805560.

The previous prime is 21341215187. The next prime is 21341215241. The reversal of 21341215231 is 13251214312.

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

It is not a de Polignac number, because 21341215231 - 2¹⁷ = 21341084159 is a prime.

It is a super-2 number, since 2×21341215231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21341215196 and 21341215205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341215241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327346 + ... + 387088.

It is an arithmetic number, because the mean of its divisors is an integer number (3048855808).

Almost surely, 2^21341215231 is an apocalyptic number.

21341215231 is a deficient number, since it is larger than the sum of its proper divisors (3049631233).

21341215231 is an equidigital number, since it uses as much as digits as its factorization.

21341215231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110781.

The product of its digits is 1440, while the sum is 25.

Adding to 21341215231 its reverse (13251214312), we get a palindrome (34592429543).

The spelling of 21341215231 in words is "twenty-one billion, three hundred forty-one million, two hundred fifteen thousand, two hundred thirty-one".