12012436381 has 8 divisors (see below), whose sum is σ = 13132785024. Its totient is φ = 10896805920.

The previous prime is 12012436361. The next prime is 12012436433. The reversal of 12012436381 is 18363421021.

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

It is not a de Polignac number, because 12012436381 - 2¹⁷ = 12012305309 is a prime.

It is a super-2 number, since 2×12012436381² (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 (12012436301) 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, 1174216 + ... + 1184401.

It is an arithmetic number, because the mean of its divisors is an integer number (1641598128).

Almost surely, 2^12012436381 is an apocalyptic number.

12012436381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012436381 is a deficient number, since it is larger than the sum of its proper divisors (1120348643).

12012436381 is a wasteful number, since it uses less digits than its factorization.

12012436381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359091.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 12012436381 in words is "twelve billion, twelve million, four hundred thirty-six thousand, three hundred eighty-one".