21340431301043 has 2 divisors, whose sum is σ = 21340431301044. Its totient is φ = 21340431301042.

The previous prime is 21340431300961. The next prime is 21340431301069. The reversal of 21340431301043 is 34010313404312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21340431301043 - 2⁸ = 21340431300787 is a prime.

It is a super-2 number, since 2×21340431301043² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21340431300997 and 21340431301015.

It is not a weakly prime, because it can be changed into another prime (21340431301073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670215650521 + 10670215650522.

It is an arithmetic number, because the mean of its divisors is an integer number (10670215650522).

Almost surely, 2^{21340431301043} is an apocalyptic number.

21340431301043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21340431301043 is an equidigital number, since it uses as much as digits as its factorization.

21340431301043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21340431301043 its reverse (34010313404312), we get a palindrome (55350744705355).

The spelling of 21340431301043 in words is "twenty-one trillion, three hundred forty billion, four hundred thirty-one million, three hundred one thousand, forty-three".