20321002132243 has 2 divisors, whose sum is σ = 20321002132244. Its totient is φ = 20321002132242.

The previous prime is 20321002132187. The next prime is 20321002132261. The reversal of 20321002132243 is 34223120012302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321002132243 is a prime.

It is a super-2 number, since 2×20321002132243² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20321002132643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160501066121 + 10160501066122.

It is an arithmetic number, because the mean of its divisors is an integer number (10160501066122).

Almost surely, 2^{20321002132243} is an apocalyptic number.

20321002132243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321002132243 is an equidigital number, since it uses as much as digits as its factorization.

20321002132243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20321002132243 its reverse (34223120012302), we get a palindrome (54544122144545).

The spelling of 20321002132243 in words is "twenty trillion, three hundred twenty-one billion, two million, one hundred thirty-two thousand, two hundred forty-three".