12021443444 has 24 divisors (see below), whose sum is σ = 22543411968. Its totient is φ = 5588988800.

The previous prime is 12021443437. The next prime is 12021443453. The reversal of 12021443444 is 44434412021.

It is a super-2 number, since 2×12021443444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059332 + ... + 1070619.

It is an arithmetic number, because the mean of its divisors is an integer number (939308832).

Almost surely, 2^12021443444 is an apocalyptic number.

It is an amenable number.

12021443444 is a deficient number, since it is larger than the sum of its proper divisors (10521968524).

12021443444 is a wasteful number, since it uses less digits than its factorization.

12021443444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130055 (or 2130053 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 12021443444 its reverse (44434412021), we get a palindrome (56455855465).

The spelling of 12021443444 in words is "twelve billion, twenty-one million, four hundred forty-three thousand, four hundred forty-four".