21340013231231 has 8 divisors (see below), whose sum is σ = 21861265608000. Its totient is φ = 20818797247360.

The previous prime is 21340013231183. The next prime is 21340013231237. The reversal of 21340013231231 is 13213231004312.

It is a happy number.

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 21340013231231 - 2²⁶ = 21339946122367 is a prime.

It is a super-2 number, since 2×21340013231231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21340013231231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340013231237) 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, 7909271 + ... + 10258488.

It is an arithmetic number, because the mean of its divisors is an integer number (2732658201000).

Almost surely, 2^{21340013231231} is an apocalyptic number.

21340013231231 is a deficient number, since it is larger than the sum of its proper divisors (521252376769).

21340013231231 is a wasteful number, since it uses less digits than its factorization.

21340013231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18196449.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21340013231231 its reverse (13213231004312), we get a palindrome (34553244235543).

The spelling of 21340013231231 in words is "twenty-one trillion, three hundred forty billion, thirteen million, two hundred thirty-one thousand, two hundred thirty-one".