2050161510721 has 2 divisors, whose sum is σ = 2050161510722. Its totient is φ = 2050161510720.

The previous prime is 2050161510707. The next prime is 2050161510781. The reversal of 2050161510721 is 1270151610502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1278337764496 + 771823746225 = 1130636^2 + 878535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2050161510721 - 2⁹ = 2050161510209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2050161510781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025080755360 + 1025080755361.

It is an arithmetic number, because the mean of its divisors is an integer number (1025080755361).

Almost surely, 2^{2050161510721} is an apocalyptic number.

It is an amenable number.

2050161510721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2050161510721 is an equidigital number, since it uses as much as digits as its factorization.

2050161510721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 2050161510721 in words is "two trillion, fifty billion, one hundred sixty-one million, five hundred ten thousand, seven hundred twenty-one".