2021313312 has 96 divisors (see below), whose sum is σ = 5909924160. Its totient is φ = 672122880.

The previous prime is 2021313251. The next prime is 2021313313. The reversal of 2021313312 is 2133131202.

2021313312 is a `hidden beast` number, since 20 + 21 + 313 + 312 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2021313313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380112 + ... + 385392.

It is an arithmetic number, because the mean of its divisors is an integer number (61561710).

Almost surely, 2^2021313312 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 2021313312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2954962080).

2021313312 is an abundant number, since it is smaller than the sum of its proper divisors (3888610848).

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

2021313312 is a wasteful number, since it uses less digits than its factorization.

2021313312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743 (or 5729 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2021313312 is about 44959.0181387450. The cubic root of 2021313312 is about 1264.3807604172.

Adding to 2021313312 its reverse (2133131202), we get a palindrome (4154444514).

The spelling of 2021313312 in words is "two billion, twenty-one million, three hundred thirteen thousand, three hundred twelve".