21313234864043 has 2 divisors, whose sum is σ = 21313234864044. Its totient is φ = 21313234864042.

The previous prime is 21313234864007. The next prime is 21313234864063. The reversal of 21313234864043 is 34046843231312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21313234864043 - 2⁴² = 16915188352939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21313234863985 and 21313234864003.

It is not a weakly prime, because it can be changed into another prime (21313234864063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656617432021 + 10656617432022.

It is an arithmetic number, because the mean of its divisors is an integer number (10656617432022).

Almost surely, 2^{21313234864043} is an apocalyptic number.

21313234864043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313234864043 is an equidigital number, since it uses as much as digits as its factorization.

21313234864043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 21313234864043 in words is "twenty-one trillion, three hundred thirteen billion, two hundred thirty-four million, eight hundred sixty-four thousand, forty-three".