13440123012 has 12 divisors (see below), whose sum is σ = 31360287056. Its totient is φ = 4480041000.

The previous prime is 13440123001. The next prime is 13440123013. The reversal of 13440123012 is 21032104431.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×13440123012³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13440123012.

It is not an unprimeable number, because it can be changed into a prime (13440123013) 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, 560005114 + ... + 560005137.

Almost surely, 2^13440123012 is an apocalyptic number.

13440123012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13440123012 is an abundant number, since it is smaller than the sum of its proper divisors (17920164044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13440123012 is a wasteful number, since it uses less digits than its factorization.

13440123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120010258 (or 1120010256 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 13440123012 its reverse (21032104431), we get a palindrome (34472227443).

The spelling of 13440123012 in words is "thirteen billion, four hundred forty million, one hundred twenty-three thousand, twelve".