2112115321 has 4 divisors (see below), whose sum is σ = 2117132644. Its totient is φ = 2107098000.

The previous prime is 2112115267. The next prime is 2112115339. The reversal of 2112115321 is 1235112112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 484880400 + 1627234921 = 22020^2 + 40339^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112115321 - 2¹⁷ = 2111984249 is a prime.

It is a super-2 number, since 2×2112115321² = 8922062258405866082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112115121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2508030 + ... + 2508871.

It is an arithmetic number, because the mean of its divisors is an integer number (529283161).

Almost surely, 2^2112115321 is an apocalyptic number.

It is an amenable number.

2112115321 is a deficient number, since it is larger than the sum of its proper divisors (5017323).

2112115321 is an equidigital number, since it uses as much as digits as its factorization.

2112115321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017322.

The product of its digits is 120, while the sum is 19.

The square root of 2112115321 is about 45957.7558307627. The cubic root of 2112115321 is about 1283.0370835977.

Adding to 2112115321 its reverse (1235112112), we get a palindrome (3347227433).

The spelling of 2112115321 in words is "two billion, one hundred twelve million, one hundred fifteen thousand, three hundred twenty-one".