12013520421444 has 12 divisors (see below), whose sum is σ = 28031547650064. Its totient is φ = 4004506807144.

The previous prime is 12013520421431. The next prime is 12013520421493. The reversal of 12013520421444 is 44412402531021.

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

It is a super-3 number, since 3×12013520421444³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500563350882 + ... + 500563350905.

It is an arithmetic number, because the mean of its divisors is an integer number (2335962304172).

Almost surely, 2^{12013520421444} is an apocalyptic number.

It is an amenable number.

12013520421444 is an abundant number, since it is smaller than the sum of its proper divisors (16018027228620).

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

12013520421444 is a wasteful number, since it uses less digits than its factorization.

12013520421444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001126701794 (or 1001126701792 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 12013520421444 its reverse (44412402531021), we get a palindrome (56425922952465).

The spelling of 12013520421444 in words is "twelve trillion, thirteen billion, five hundred twenty million, four hundred twenty-one thousand, four hundred forty-four".