2011021020021 has 8 divisors (see below), whose sum is σ = 2887619926240. Its totient is φ = 1237551396912.

The previous prime is 2011021020013. The next prime is 2011021020053. The reversal of 2011021020021 is 1200201201102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2011021020021 - 2³ = 2011021020013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011021019979 and 2011021020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011021020221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25782320731 + ... + 25782320808.

It is an arithmetic number, because the mean of its divisors is an integer number (360952490780).

Almost surely, 2^{2011021020021} is an apocalyptic number.

It is an amenable number.

2011021020021 is a deficient number, since it is larger than the sum of its proper divisors (876598906219).

2011021020021 is a wasteful number, since it uses less digits than its factorization.

2011021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51564641555.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2011021020021 its reverse (1200201201102), we get a palindrome (3211222221123).

The spelling of 2011021020021 in words is "two trillion, eleven billion, twenty-one million, twenty thousand, twenty-one".