12442144402 has 4 divisors (see below), whose sum is σ = 18663216606. Its totient is φ = 6221072200.

The previous prime is 12442144367. The next prime is 12442144409. The reversal of 12442144402 is 20444124421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8473018401 + 3969126001 = 92049^2 + 63001^2 .

It is not an unprimeable number, because it can be changed into a prime (12442144409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110536099 + ... + 3110536102.

Almost surely, 2^12442144402 is an apocalyptic number.

12442144402 is a deficient number, since it is larger than the sum of its proper divisors (6221072204).

12442144402 is an equidigital number, since it uses as much as digits as its factorization.

12442144402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221072203.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 12442144402 its reverse (20444124421), we get a palindrome (32886268823).

The spelling of 12442144402 in words is "twelve billion, four hundred forty-two million, one hundred forty-four thousand, four hundred two".