21020132112943 has 2 divisors, whose sum is σ = 21020132112944. Its totient is φ = 21020132112942.

The previous prime is 21020132112929. The next prime is 21020132113051. The reversal of 21020132112943 is 34921123102012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020132112943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020132112643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510066056471 + 10510066056472.

It is an arithmetic number, because the mean of its divisors is an integer number (10510066056472).

Almost surely, 2^{21020132112943} is an apocalyptic number.

21020132112943 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020132112943 is an equidigital number, since it uses as much as digits as its factorization.

21020132112943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 21020132112943 its reverse (34921123102012), we get a palindrome (55941255214955).

The spelling of 21020132112943 in words is "twenty-one trillion, twenty billion, one hundred thirty-two million, one hundred twelve thousand, nine hundred forty-three".