12161354133 has 4 divisors (see below), whose sum is σ = 16215138848. Its totient is φ = 8107569420.

The previous prime is 12161354123. The next prime is 12161354143. The reversal of 12161354133 is 33145316121.

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 an interprime number because it is at equal distance from previous prime (12161354123) and next prime (12161354143).

It is not a de Polignac number, because 12161354133 - 2¹⁸ = 12161091989 is a prime.

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 12161354133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161354123) 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 3 ways as a sum of consecutive naturals, for example, 2026892353 + ... + 2026892358.

It is an arithmetic number, because the mean of its divisors is an integer number (4053784712).

Almost surely, 2^12161354133 is an apocalyptic number.

It is an amenable number.

12161354133 is a deficient number, since it is larger than the sum of its proper divisors (4053784715).

12161354133 is an equidigital number, since it uses as much as digits as its factorization.

12161354133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053784714.

The product of its digits is 6480, while the sum is 30.

The spelling of 12161354133 in words is "twelve billion, one hundred sixty-one million, three hundred fifty-four thousand, one hundred thirty-three".