2721214014661 has 2 divisors, whose sum is σ = 2721214014662. Its totient is φ = 2721214014660.

The previous prime is 2721214014637. The next prime is 2721214014683. The reversal of 2721214014661 is 1664104121272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2051680952161 + 669533062500 = 1432369^2 + 818250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721214014661 - 2²³ = 2721205626053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2721214014661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721214614661) 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, 1360607007330 + 1360607007331.

It is an arithmetic number, because the mean of its divisors is an integer number (1360607007331).

Almost surely, 2^{2721214014661} is an apocalyptic number.

It is an amenable number.

2721214014661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721214014661 is an equidigital number, since it uses as much as digits as its factorization.

2721214014661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 2721214014661 in words is "two trillion, seven hundred twenty-one billion, two hundred fourteen million, fourteen thousand, six hundred sixty-one".