21412096661 has 2 divisors, whose sum is σ = 21412096662. Its totient is φ = 21412096660.

The previous prime is 21412096631. The next prime is 21412096663. The reversal of 21412096661 is 16669021412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11950643761 + 9461452900 = 109319^2 + 97270^2 .

It is a cyclic number.

It is not a de Polignac number, because 21412096661 - 2¹⁸ = 21411834517 is a prime.

Together with 21412096663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21412096663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706048330 + 10706048331.

It is an arithmetic number, because the mean of its divisors is an integer number (10706048331).

Almost surely, 2^21412096661 is an apocalyptic number.

It is an amenable number.

21412096661 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412096661 is an equidigital number, since it uses as much as digits as its factorization.

21412096661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 21412096661 in words is "twenty-one billion, four hundred twelve million, ninety-six thousand, six hundred sixty-one".