20021010020011 has 16 divisors (see below), whose sum is σ = 26881356112128. Its totient is φ = 14400726487200.

The previous prime is 20021010019957. The next prime is 20021010020051. The reversal of 20021010020011 is 11002001012002.

It is a cyclic number.

It is not a de Polignac number, because 20021010020011 - 2⁷ = 20021010019883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021010020011.

It is not an unprimeable number, because it can be changed into a prime (20021010020051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10000503505 + ... + 10000505506.

It is an arithmetic number, because the mean of its divisors is an integer number (1680084757008).

Almost surely, 2^{20021010020011} is an apocalyptic number.

20021010020011 is a deficient number, since it is larger than the sum of its proper divisors (6860346092117).

20021010020011 is a wasteful number, since it uses less digits than its factorization.

20021010020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001009042.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20021010020011 its reverse (11002001012002), we get a palindrome (31023011032013).

The spelling of 20021010020011 in words is "twenty trillion, twenty-one billion, ten million, twenty thousand, eleven".