2011111200021 has 32 divisors (see below), whose sum is σ = 3343685677056. Its totient is φ = 1044564408000.

The previous prime is 2011111200013. The next prime is 2011111200037. The reversal of 2011111200021 is 1200021111102.

It is not a de Polignac number, because 2011111200021 - 2³ = 2011111200013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111200041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737316 + ... + 2136786.

It is an arithmetic number, because the mean of its divisors is an integer number (104490177408).

Almost surely, 2^{2011111200021} is an apocalyptic number.

2011111200021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2011111200021 is a deficient number, since it is larger than the sum of its proper divisors (1332574477035).

2011111200021 is a wasteful number, since it uses less digits than its factorization.

2011111200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405713.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2011111200021 its reverse (1200021111102), we get a palindrome (3211132311123).

The spelling of 2011111200021 in words is "two trillion, eleven billion, one hundred eleven million, two hundred thousand, twenty-one".