2112321451 has 4 divisors (see below), whose sum is σ = 2236575672. Its totient is φ = 1988067232.

The previous prime is 2112321443. The next prime is 2112321457. The reversal of 2112321451 is 1541232112.

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

It is a cyclic number.

It is not a de Polignac number, because 2112321451 - 2³ = 2112321443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112321457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62127085 + ... + 62127118.

It is an arithmetic number, because the mean of its divisors is an integer number (559143918).

Almost surely, 2^2112321451 is an apocalyptic number.

2112321451 is a deficient number, since it is larger than the sum of its proper divisors (124254221).

2112321451 is a wasteful number, since it uses less digits than its factorization.

2112321451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124254220.

The product of its digits is 480, while the sum is 22.

The square root of 2112321451 is about 45959.9983790252. The cubic root of 2112321451 is about 1283.0788211910.

Adding to 2112321451 its reverse (1541232112), we get a palindrome (3653553563).

The spelling of 2112321451 in words is "two billion, one hundred twelve million, three hundred twenty-one thousand, four hundred fifty-one".