981056721299 has 2 divisors, whose sum is σ = 981056721300. Its totient is φ = 981056721298.

The previous prime is 981056721287. The next prime is 981056721319. The reversal of 981056721299 is 992127650189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981056721299 - 2¹⁶ = 981056655763 is a prime.

It is not a weakly prime, because it can be changed into another prime (981056721269) 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, 490528360649 + 490528360650.

It is an arithmetic number, because the mean of its divisors is an integer number (490528360650).

Almost surely, 2^981056721299 is an apocalyptic number.

981056721299 is a deficient number, since it is larger than the sum of its proper divisors (1).

981056721299 is an equidigital number, since it uses as much as digits as its factorization.

981056721299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 981056721299 in words is "nine hundred eighty-one billion, fifty-six million, seven hundred twenty-one thousand, two hundred ninety-nine".