20321212110047 has 2 divisors, whose sum is σ = 20321212110048. Its totient is φ = 20321212110046.

The previous prime is 20321212110013. The next prime is 20321212110103. The reversal of 20321212110047 is 74001121212302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321212110047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321212109998 and 20321212110025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321212110007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160606055023 + 10160606055024.

It is an arithmetic number, because the mean of its divisors is an integer number (10160606055024).

Almost surely, 2^{20321212110047} is an apocalyptic number.

20321212110047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321212110047 is an equidigital number, since it uses as much as digits as its factorization.

20321212110047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 20321212110047 its reverse (74001121212302), we get a palindrome (94322333322349).

The spelling of 20321212110047 in words is "twenty trillion, three hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, forty-seven".