21310102043 has 2 divisors, whose sum is σ = 21310102044. Its totient is φ = 21310102042.

The previous prime is 21310102013. The next prime is 21310102129. The reversal of 21310102043 is 34020101312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21310102043 - 2³⁴ = 4130232859 is a prime.

It is not a weakly prime, because it can be changed into another prime (21310102003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655051021 + 10655051022.

It is an arithmetic number, because the mean of its divisors is an integer number (10655051022).

Almost surely, 2^21310102043 is an apocalyptic number.

21310102043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310102043 is an equidigital number, since it uses as much as digits as its factorization.

21310102043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21310102043 its reverse (34020101312), we get a palindrome (55330203355).

The spelling of 21310102043 in words is "twenty-one billion, three hundred ten million, one hundred two thousand, forty-three".