2112530021 has 8 divisors (see below), whose sum is σ = 2459873664. Its totient is φ = 1776574800.

The previous prime is 2112529957. The next prime is 2112530023. The reversal of 2112530021 is 1200352112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2112530021 - 2⁶ = 2112529957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112530023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2846705 + ... + 2847446.

It is an arithmetic number, because the mean of its divisors is an integer number (307484208).

Almost surely, 2^2112530021 is an apocalyptic number.

It is an amenable number.

2112530021 is a deficient number, since it is larger than the sum of its proper divisors (347343643).

2112530021 is an equidigital number, since it uses as much as digits as its factorization.

2112530021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694211.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2112530021 is about 45962.2673613911. The cubic root of 2112530021 is about 1283.1210500765.

Adding to 2112530021 its reverse (1200352112), we get a palindrome (3312882133).

The spelling of 2112530021 in words is "two billion, one hundred twelve million, five hundred thirty thousand, twenty-one".