12118491381 has 8 divisors (see below), whose sum is σ = 16431852960. Its totient is φ = 7942062032.

The previous prime is 12118491353. The next prime is 12118491433. The reversal of 12118491381 is 18319481121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12118491381 - 2¹³ = 12118483189 is a prime.

It is a super-2 number, since 2×12118491381² (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 (12118491481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34232850 + ... + 34233203.

It is an arithmetic number, because the mean of its divisors is an integer number (2053981620).

Almost surely, 2^12118491381 is an apocalyptic number.

It is an amenable number.

12118491381 is a deficient number, since it is larger than the sum of its proper divisors (4313361579).

12118491381 is an equidigital number, since it uses as much as digits as its factorization.

12118491381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68466115.

The product of its digits is 13824, while the sum is 39.

The spelling of 12118491381 in words is "twelve billion, one hundred eighteen million, four hundred ninety-one thousand, three hundred eighty-one".