1010047721 has 2 divisors, whose sum is σ = 1010047722. Its totient is φ = 1010047720.

The previous prime is 1010047697. The next prime is 1010047723. The reversal of 1010047721 is 1277400101.

1010047721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000836496 + 9211225 = 31636^2 + 3035^2 .

It is an emirp because it is prime and its reverse (1277400101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010047721 is a prime.

Together with 1010047723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1010047723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505023860 + 505023861.

It is an arithmetic number, because the mean of its divisors is an integer number (505023861).

Almost surely, 2^1010047721 is an apocalyptic number.

It is an amenable number.

1010047721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010047721 is an equidigital number, since it uses as much as digits as its factorization.

1010047721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 1010047721 is about 31781.2479459193. The cubic root of 1010047721 is about 1003.3380851225.

Adding to 1010047721 its reverse (1277400101), we get a palindrome (2287447822).

The spelling of 1010047721 in words is "one billion, ten million, forty-seven thousand, seven hundred twenty-one".