2021131336 has 64 divisors (see below), whose sum is σ = 4509446400. Its totient is φ = 830898432.

The previous prime is 2021131303. The next prime is 2021131337. The reversal of 2021131336 is 6331311202.

It is a super-2 number, since 2×2021131336² = 8169943754722289792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021131337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251005 + ... + 258931.

It is an arithmetic number, because the mean of its divisors is an integer number (70460100).

Almost surely, 2^2021131336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021131336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2254723200).

2021131336 is an abundant number, since it is smaller than the sum of its proper divisors (2488315064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021131336 is a wasteful number, since it uses less digits than its factorization.

2021131336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8126 (or 8122 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 2021131336 is about 44956.9942945478. The cubic root of 2021131336 is about 1264.3428158035.

Adding to 2021131336 its reverse (6331311202), we get a palindrome (8352442538).

The spelling of 2021131336 in words is "two billion, twenty-one million, one hundred thirty-one thousand, three hundred thirty-six".