2112521 has 4 divisors (see below), whose sum is σ = 2121600. Its totient is φ = 2103444.

The previous prime is 2112511. The next prime is 2112533. The reversal of 2112521 is 1252112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2112521 - 2¹⁰ = 2111497 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112496 and 2112505.

It is not an unprimeable number, because it can be changed into a prime (2112511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4181 + ... + 4658.

It is an arithmetic number, because the mean of its divisors is an integer number (530400).

2^2112521 is an apocalyptic number.

It is an amenable number.

2112521 is a deficient number, since it is larger than the sum of its proper divisors (9079).

2112521 is an equidigital number, since it uses as much as digits as its factorization.

2112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9078.

The product of its digits is 40, while the sum is 14.

The square root of 2112521 is about 1453.4514095765. The cubic root of 2112521 is about 128.3119223664.

Adding to 2112521 its reverse (1252112), we get a palindrome (3364633).

The spelling of 2112521 in words is "two million, one hundred twelve thousand, five hundred twenty-one".