20012002011 has 6 divisors (see below), whose sum is σ = 28906225140. Its totient is φ = 13341334668.

The previous prime is 20012002001. The next prime is 20012002039. The reversal of 20012002011 is 11020021002.

It is not a de Polignac number, because 20012002011 - 2¹⁹ = 20011477723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2223555779 = 20012002011 / (2 + 0 + 0 + 1 + 2 + 0 + 0 + 2 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 20012001984 and 20012002002.

It is not an unprimeable number, because it can be changed into a prime (20012002001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111777881 + ... + 1111777898.

It is an arithmetic number, because the mean of its divisors is an integer number (4817704190).

Almost surely, 2^20012002011 is an apocalyptic number.

20012002011 is a deficient number, since it is larger than the sum of its proper divisors (8894223129).

20012002011 is a wasteful number, since it uses less digits than its factorization.

20012002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223555785 (or 2223555782 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012002011 its reverse (11020021002), we get a palindrome (31032023013).

The spelling of 20012002011 in words is "twenty billion, twelve million, two thousand, eleven".