21611241737443 has 2 divisors, whose sum is σ = 21611241737444. Its totient is φ = 21611241737442.

The previous prime is 21611241737431. The next prime is 21611241737479. The reversal of 21611241737443 is 34473714211612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21611241737443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21611241737393 and 21611241737402.

It is not a weakly prime, because it can be changed into another prime (21611241747443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805620868721 + 10805620868722.

It is an arithmetic number, because the mean of its divisors is an integer number (10805620868722).

Almost surely, 2^{21611241737443} is an apocalyptic number.

21611241737443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21611241737443 is an equidigital number, since it uses as much as digits as its factorization.

21611241737443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The spelling of 21611241737443 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-one million, seven hundred thirty-seven thousand, four hundred forty-three".