12118881533 has 4 divisors (see below), whose sum is σ = 13220598048. Its totient is φ = 11017165020.

The previous prime is 12118881497. The next prime is 12118881581. The reversal of 12118881533 is 33518881121.

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 12118881533 - 2¹⁰ = 12118880509 is a prime.

It is a super-2 number, since 2×12118881533² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118881433) 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, 550858241 + ... + 550858262.

It is an arithmetic number, because the mean of its divisors is an integer number (3305149512).

Almost surely, 2^12118881533 is an apocalyptic number.

It is an amenable number.

12118881533 is a deficient number, since it is larger than the sum of its proper divisors (1101716515).

12118881533 is a wasteful number, since it uses less digits than its factorization.

12118881533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101716514.

The product of its digits is 46080, while the sum is 41.

The spelling of 12118881533 in words is "twelve billion, one hundred eighteen million, eight hundred eighty-one thousand, five hundred thirty-three".