21300131122043 has 2 divisors, whose sum is σ = 21300131122044. Its totient is φ = 21300131122042.

The previous prime is 21300131122021. The next prime is 21300131122091. The reversal of 21300131122043 is 34022113100312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300131122043 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21300131122343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650065561021 + 10650065561022.

It is an arithmetic number, because the mean of its divisors is an integer number (10650065561022).

Almost surely, 2^{21300131122043} is an apocalyptic number.

21300131122043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300131122043 is an equidigital number, since it uses as much as digits as its factorization.

21300131122043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21300131122043 its reverse (34022113100312), we get a palindrome (55322244222355).

The spelling of 21300131122043 in words is "twenty-one trillion, three hundred billion, one hundred thirty-one million, one hundred twenty-two thousand, forty-three".