3261680134021 has 2 divisors, whose sum is σ = 3261680134022. Its totient is φ = 3261680134020.

The previous prime is 3261680134003. The next prime is 3261680134061. The reversal of 3261680134021 is 1204310861623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3139225629796 + 122454504225 = 1771786^2 + 349935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3261680134021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261680134001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630840067010 + 1630840067011.

It is an arithmetic number, because the mean of its divisors is an integer number (1630840067011).

Almost surely, 2^{3261680134021} is an apocalyptic number.

It is an amenable number.

3261680134021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261680134021 is an equidigital number, since it uses as much as digits as its factorization.

3261680134021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

Adding to 3261680134021 its reverse (1204310861623), we get a palindrome (4465990995644).

The spelling of 3261680134021 in words is "three trillion, two hundred sixty-one billion, six hundred eighty million, one hundred thirty-four thousand, twenty-one".