1001320011 has 12 divisors (see below), whose sum is σ = 1485442192. Its totient is φ = 649504656.

The previous prime is 1001319989. The next prime is 1001320013. The reversal of 1001320011 is 1100231001.

It is not a de Polignac number, because 1001320011 - 2⁷ = 1001319883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001319975 and 1001320002.

It is not an unprimeable number, because it can be changed into a prime (1001320013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1503151 + ... + 1503816.

Almost surely, 2^1001320011 is an apocalyptic number.

1001320011 is a deficient number, since it is larger than the sum of its proper divisors (484122181).

1001320011 is a wasteful number, since it uses less digits than its factorization.

1001320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007010 (or 3007007 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1001320011 is about 31643.6409251527. The cubic root of 1001320011 is about 1000.4398102053.

Adding to 1001320011 its reverse (1100231001), we get a palindrome (2101551012).

The spelling of 1001320011 in words is "one billion, one million, three hundred twenty thousand, eleven".