20012011001 has 16 divisors (see below), whose sum is σ = 20509821648. Its totient is φ = 19521331200.

The previous prime is 20012010983. The next prime is 20012011013. The reversal of 20012011001 is 10011021002.

It can be written as a sum of positive squares in 8 ways, for example, as 444197776 + 19567813225 = 21076^2 + 139885^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012011001 - 2¹⁴ = 20011994617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012011001.

It is not an unprimeable number, because it can be changed into a prime (20012013001) 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 in 15 ways as a sum of consecutive naturals, for example, 2806721 + ... + 2813841.

It is an arithmetic number, because the mean of its divisors is an integer number (1281863853).

Almost surely, 2^20012011001 is an apocalyptic number.

It is an amenable number.

20012011001 is a deficient number, since it is larger than the sum of its proper divisors (497810647).

20012011001 is a wasteful number, since it uses less digits than its factorization.

20012011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20012011001 its reverse (10011021002), we get a palindrome (30023032003).

The spelling of 20012011001 in words is "twenty billion, twelve million, eleven thousand, one".