12013155402 has 48 divisors (see below), whose sum is σ = 25682793120. Its totient is φ = 3741531360.

The previous prime is 12013155391. The next prime is 12013155421. The reversal of 12013155402 is 20455131021.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131293 + ... + 203135.

It is an arithmetic number, because the mean of its divisors is an integer number (535058190).

Almost surely, 2^12013155402 is an apocalyptic number.

12013155402 is an abundant number, since it is smaller than the sum of its proper divisors (13669637718).

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

12013155402 is a wasteful number, since it uses less digits than its factorization.

12013155402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71939 (or 71908 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 12013155402 its reverse (20455131021), we get a palindrome (32468286423).

The spelling of 12013155402 in words is "twelve billion, thirteen million, one hundred fifty-five thousand, four hundred two".