21340013231230 has 16 divisors (see below), whose sum is σ = 38505940752240. Its totient is φ = 8515134862272.

The previous prime is 21340013231183. The next prime is 21340013231237. The reversal of 21340013231230 is 3213231004312.

It is a junction number, because it is equal to n+sod(n) for n = 21340013231195 and 21340013231204.

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, 2608799484 + ... + 2608807663.

It is an arithmetic number, because the mean of its divisors is an integer number (2406621297015).

Almost surely, 2^{21340013231230} is an apocalyptic number.

21340013231230 is a deficient number, since it is larger than the sum of its proper divisors (17165927521010).

21340013231230 is a wasteful number, since it uses less digits than its factorization.

21340013231230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217607563.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21340013231230 its reverse (3213231004312), we get a palindrome (24553244235542).

The spelling of 21340013231230 in words is "twenty-one trillion, three hundred forty billion, thirteen million, two hundred thirty-one thousand, two hundred thirty".