12111142408 has 8 divisors (see below), whose sum is σ = 22708392030. Its totient is φ = 6055571200.

The previous prime is 12111142387. The next prime is 12111142411. The reversal of 12111142408 is 80424111121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7568652004 + 4542490404 = 86998^2 + 67398^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756946393 + ... + 756946408.

Almost surely, 2^12111142408 is an apocalyptic number.

It is an amenable number.

12111142408 is a deficient number, since it is larger than the sum of its proper divisors (10597249622).

12111142408 is a wasteful number, since it uses less digits than its factorization.

12111142408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513892807 (or 1513892803 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 12111142408 its reverse (80424111121), we get a palindrome (92535253529).

The spelling of 12111142408 in words is "twelve billion, one hundred eleven million, one hundred forty-two thousand, four hundred eight".