20021100020011 has 12 divisors (see below), whose sum is σ = 21273883616880. Its totient is φ = 18838254216320.

The previous prime is 20021100019997. The next prime is 20021100020021. The reversal of 20021100020011 is 11002000112002.

It is not a de Polignac number, because 20021100020011 - 2⁷ = 20021100019883 is a prime.

It is a super-2 number, since 2×20021100020011² (a number of 27 digits) contains 22 as substring.

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 20021100020011.

It is not an unprimeable number, because it can be changed into a prime (20021100020021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8374816 + ... + 10496653.

It is an arithmetic number, because the mean of its divisors is an integer number (1772823634740).

Almost surely, 2^{20021100020011} is an apocalyptic number.

20021100020011 is a deficient number, since it is larger than the sum of its proper divisors (1252783596869).

20021100020011 is a wasteful number, since it uses less digits than its factorization.

20021100020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18875174 (or 18875157 counting only the distinct ones).

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

Adding to 20021100020011 its reverse (11002000112002), we get a palindrome (31023100132013).

The spelling of 20021100020011 in words is "twenty trillion, twenty-one billion, one hundred million, twenty thousand, eleven".