21140431034243 has 2 divisors, whose sum is σ = 21140431034244. Its totient is φ = 21140431034242.

The previous prime is 21140431034137. The next prime is 21140431034267. The reversal of 21140431034243 is 34243013404112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140431034243 - 2²⁰ = 21140429985667 is a prime.

It is not a weakly prime, because it can be changed into another prime (21140481034243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570215517121 + 10570215517122.

It is an arithmetic number, because the mean of its divisors is an integer number (10570215517122).

Almost surely, 2^{21140431034243} is an apocalyptic number.

21140431034243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140431034243 is an equidigital number, since it uses as much as digits as its factorization.

21140431034243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21140431034243 its reverse (34243013404112), we get a palindrome (55383444438355).

The spelling of 21140431034243 in words is "twenty-one trillion, one hundred forty billion, four hundred thirty-one million, thirty-four thousand, two hundred forty-three".