2221320064687 has 2 divisors, whose sum is σ = 2221320064688. Its totient is φ = 2221320064686.

The previous prime is 2221320064637. The next prime is 2221320064697. The reversal of 2221320064687 is 7864600231222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221320064687 - 2¹⁵ = 2221320031919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221320064637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110660032343 + 1110660032344.

It is an arithmetic number, because the mean of its divisors is an integer number (1110660032344).

Almost surely, 2^{2221320064687} is an apocalyptic number.

2221320064687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221320064687 is an equidigital number, since it uses as much as digits as its factorization.

2221320064687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 2221320064687 in words is "two trillion, two hundred twenty-one billion, three hundred twenty million, sixty-four thousand, six hundred eighty-seven".