12054512117 has 4 divisors (see below), whose sum is σ = 12054732480. Its totient is φ = 12054291756.

The previous prime is 12054512111. The next prime is 12054512123. The reversal of 12054512117 is 71121545021.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (12054512111) and next prime (12054512123).

It is a cyclic number.

It is not a de Polignac number, because 12054512117 - 2⁴ = 12054512101 is a prime.

It is a super-2 number, since 2×12054512117² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12054512117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12054512111) 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, 41234 + ... + 160652.

It is an arithmetic number, because the mean of its divisors is an integer number (3013683120).

Almost surely, 2^12054512117 is an apocalyptic number.

It is an amenable number.

12054512117 is a deficient number, since it is larger than the sum of its proper divisors (220363).

12054512117 is a wasteful number, since it uses less digits than its factorization.

12054512117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220362.

The product of its (nonzero) digits is 2800, while the sum is 29.

The spelling of 12054512117 in words is "twelve billion, fifty-four million, five hundred twelve thousand, one hundred seventeen".