2101312 has 14 divisors (see below), whose sum is σ = 4169918. Its totient is φ = 1050624.

The previous prime is 2101283. The next prime is 2101313. The reversal of 2101312 is 2131012.

It can be written as a sum of positive squares in only one way, i.e., 1893376 + 207936 = 1376^2 + 456^2 .

It is not an unprimeable number, because it can be changed into a prime (2101313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16353 + ... + 16480.

2^2101312 is an apocalyptic number.

It is an amenable number.

2101312 is a deficient number, since it is larger than the sum of its proper divisors (2068606).

2101312 is an equidigital number, since it uses as much as digits as its factorization.

2101312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32845 (or 32835 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2101312 is about 1449.5902869432. The cubic root of 2101312 is about 128.0845795161.

Adding to 2101312 its reverse (2131012), we get a palindrome (4232324).

It can be divided in two parts, 21013 and 12, that added together give a square (21025 = 145²).

The spelling of 2101312 in words is "two million, one hundred one thousand, three hundred twelve".