5011001001 has 24 divisors (see below), whose sum is σ = 7447920480. Its totient is φ = 3244703616.

The previous prime is 5011000997. The next prime is 5011001003. The reversal of 5011001001 is 1001001105.

It is not a de Polignac number, because 5011001001 - 2² = 5011000997 is a prime.

It is a super-2 number, since 2×5011001001² = 50220262064046004002, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (5011001003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33105 + ... + 105441.

It is an arithmetic number, because the mean of its divisors is an integer number (310330020).

Almost surely, 2^5011001001 is an apocalyptic number.

It is an amenable number.

5011001001 is a deficient number, since it is larger than the sum of its proper divisors (2436919479).

5011001001 is a wasteful number, since it uses less digits than its factorization.

5011001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72565 (or 72562 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 5011001001 is about 70788.4242019838. The cubic root of 5011001001 is about 1711.2291245182.

Adding to 5011001001 its reverse (1001001105), we get a palindrome (6012002106).

The spelling of 5011001001 in words is "five billion, eleven million, one thousand, one".