2011200020021 has 16 divisors (see below), whose sum is σ = 2023560929280. Its totient is φ = 1998882491760.

The previous prime is 2011200020003. The next prime is 2011200020033. The reversal of 2011200020021 is 1200200021102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2011200020021 - 2⁶ = 2011200019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011200019984 and 2011200020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011200020321) 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, 474002126 + ... + 474006368.

It is an arithmetic number, because the mean of its divisors is an integer number (126472558080).

Almost surely, 2^{2011200020021} is an apocalyptic number.

It is an amenable number.

2011200020021 is a deficient number, since it is larger than the sum of its proper divisors (12360909259).

2011200020021 is a wasteful number, since it uses less digits than its factorization.

2011200020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2011200020021 its reverse (1200200021102), we get a palindrome (3211400041123).

The spelling of 2011200020021 in words is "two trillion, eleven billion, two hundred million, twenty thousand, twenty-one".