2021331013 has 8 divisors (see below), whose sum is σ = 2217890808. Its totient is φ = 1830638784.

The previous prime is 2021331007. The next prime is 2021331029. The reversal of 2021331013 is 3101331202.

It can be written as a sum of positive squares in 4 ways, for example, as 4153444 + 2017177569 = 2038^2 + 44913^2 .

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

It is not a de Polignac number, because 2021331013 - 2⁵ = 2021330981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021331043) 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, 1466170 + ... + 1467547.

It is an arithmetic number, because the mean of its divisors is an integer number (277236351).

Almost surely, 2^2021331013 is an apocalyptic number.

It is an amenable number.

2021331013 is a deficient number, since it is larger than the sum of its proper divisors (196559795).

2021331013 is a wasteful number, since it uses less digits than its factorization.

2021331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933783.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2021331013 is about 44959.2149953711. The cubic root of 2021331013 is about 1264.3844512087.

Adding to 2021331013 its reverse (3101331202), we get a palindrome (5122662215).

The spelling of 2021331013 in words is "two billion, twenty-one million, three hundred thirty-one thousand, thirteen".