1013721011 has 2 divisors, whose sum is σ = 1013721012. Its totient is φ = 1013721010.

The previous prime is 1013720993. The next prime is 1013721017. The reversal of 1013721011 is 1101273101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013721011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1013721017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506860505 + 506860506.

It is an arithmetic number, because the mean of its divisors is an integer number (506860506).

Almost surely, 2^1013721011 is an apocalyptic number.

1013721011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013721011 is an equidigital number, since it uses as much as digits as its factorization.

1013721011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 17.

The square root of 1013721011 is about 31838.9857093470. The cubic root of 1013721011 is about 1004.5529098858.

Adding to 1013721011 its reverse (1101273101), we get a palindrome (2114994112).

The spelling of 1013721011 in words is "one billion, thirteen million, seven hundred twenty-one thousand, eleven".