12120454581 has 4 divisors (see below), whose sum is σ = 16160606112. Its totient is φ = 8080303052.

The previous prime is 12120454543. The next prime is 12120454607. The reversal of 12120454581 is 18545402121.

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 12120454581 - 2⁹ = 12120454069 is a prime.

It is a super-2 number, since 2×12120454581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120454501) 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, 2020075761 + ... + 2020075766.

It is an arithmetic number, because the mean of its divisors is an integer number (4040151528).

Almost surely, 2^12120454581 is an apocalyptic number.

It is an amenable number.

12120454581 is a deficient number, since it is larger than the sum of its proper divisors (4040151531).

12120454581 is an equidigital number, since it uses as much as digits as its factorization.

12120454581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040151530.

The product of its (nonzero) digits is 12800, while the sum is 33.

The spelling of 12120454581 in words is "twelve billion, one hundred twenty million, four hundred fifty-four thousand, five hundred eighty-one".