12143521444 has 12 divisors (see below), whose sum is σ = 21253956444. Its totient is φ = 6070962464.

The previous prime is 12143521441. The next prime is 12143521513. The reversal of 12143521444 is 44412534121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10907295844 + 1236225600 = 104438^2 + 35160^2 .

It is a super-2 number, since 2×12143521444² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12143521441) 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, 164659 + ... + 226714.

It is an arithmetic number, because the mean of its divisors is an integer number (1771163037).

Almost surely, 2^12143521444 is an apocalyptic number.

It is an amenable number.

12143521444 is a deficient number, since it is larger than the sum of its proper divisors (9110435000).

12143521444 is a wasteful number, since it uses less digits than its factorization.

12143521444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399134 (or 399132 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The spelling of 12143521444 in words is "twelve billion, one hundred forty-three million, five hundred twenty-one thousand, four hundred forty-four".