12111111402 has 16 divisors (see below), whose sum is σ = 26085470880. Its totient is φ = 3726495792.

The previous prime is 12111111373. The next prime is 12111111437. The reversal of 12111111402 is 20411111121.

It is a happy number.

12111111402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77635252 + ... + 77635407.

It is an arithmetic number, because the mean of its divisors is an integer number (1630341930).

Almost surely, 2^12111111402 is an apocalyptic number.

12111111402 is an abundant number, since it is smaller than the sum of its proper divisors (13974359478).

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

12111111402 is a wasteful number, since it uses less digits than its factorization.

12111111402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155270677.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12111111402 its reverse (20411111121), we get a palindrome (32522222523).

The spelling of 12111111402 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, four hundred two".