20102001011 has 16 divisors (see below), whose sum is σ = 20522759040. Its totient is φ = 19685877120.

The previous prime is 20102001001. The next prime is 20102001037. The reversal of 20102001011 is 11010020102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102001011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102001011.

It is not an unprimeable number, because it can be changed into a prime (20102001001) 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 in 15 ways as a sum of consecutive naturals, for example, 9388001 + ... + 9390141.

It is an arithmetic number, because the mean of its divisors is an integer number (1282672440).

Almost surely, 2^20102001011 is an apocalyptic number.

20102001011 is a deficient number, since it is larger than the sum of its proper divisors (420758029).

20102001011 is a wasteful number, since it uses less digits than its factorization.

20102001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134.

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

Adding to 20102001011 its reverse (11010020102), we get a palindrome (31112021113).

The spelling of 20102001011 in words is "twenty billion, one hundred two million, one thousand, eleven".