2021312 has 14 divisors (see below), whose sum is σ = 4011168. Its totient is φ = 1010624.

The previous prime is 2021291. The next prime is 2021321. The reversal of 2021312 is 2131202.

It is a happy number.

2021312 is nontrivially palindromic in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2021293 and 2021302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15728 + ... + 15855.

It is an arithmetic number, because the mean of its divisors is an integer number (286512).

2^2021312 is an apocalyptic number.

It is an amenable number.

2021312 is a deficient number, since it is larger than the sum of its proper divisors (1989856).

2021312 is an equidigital number, since it uses as much as digits as its factorization.

2021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31595 (or 31585 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2021312 is about 1421.7285254225. The cubic root of 2021312 is about 126.4380486854.

Adding to 2021312 its reverse (2131202), we get a palindrome (4152514).

It can be divided in two parts, 20213 and 12, that multiplied together give a triangular number (242556 = T₆₉₆).

The spelling of 2021312 in words is "two million, twenty-one thousand, three hundred twelve".