2104446637721 has 2 divisors, whose sum is σ = 2104446637722. Its totient is φ = 2104446637720.

The previous prime is 2104446637717. The next prime is 2104446637759. The reversal of 2104446637721 is 1277366444012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2066708136025 + 37738501696 = 1437605^2 + 194264^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104446637721 - 2² = 2104446637717 is a prime.

It is not a weakly prime, because it can be changed into another prime (2104446637021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052223318860 + 1052223318861.

It is an arithmetic number, because the mean of its divisors is an integer number (1052223318861).

Almost surely, 2^{2104446637721} is an apocalyptic number.

It is an amenable number.

2104446637721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104446637721 is an equidigital number, since it uses as much as digits as its factorization.

2104446637721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 47.

The spelling of 2104446637721 in words is "two trillion, one hundred four billion, four hundred forty-six million, six hundred thirty-seven thousand, seven hundred twenty-one".