2011131021 has 8 divisors (see below), whose sum is σ = 2725467424. Its totient is φ = 1318774320.

The previous prime is 2011131011. The next prime is 2011131049. The reversal of 2011131021 is 1201311102.

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

It is a de Polignac number, because none of the positive numbers 2^k-2011131021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011130988 and 2011131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011131011) 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, 5494711 + ... + 5495076.

It is an arithmetic number, because the mean of its divisors is an integer number (340683428).

Almost surely, 2^2011131021 is an apocalyptic number.

It is an amenable number.

2011131021 is a deficient number, since it is larger than the sum of its proper divisors (714336403).

2011131021 is a wasteful number, since it uses less digits than its factorization.

2011131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10989851.

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

The square root of 2011131021 is about 44845.6354732543. The cubic root of 2011131021 is about 1262.2540949815.

Adding to 2011131021 its reverse (1201311102), we get a palindrome (3212442123).

The spelling of 2011131021 in words is "two billion, eleven million, one hundred thirty-one thousand, twenty-one".