12111111403 has 16 divisors (see below), whose sum is σ = 13066131456. Its totient is φ = 11192987520.

The previous prime is 12111111373. The next prime is 12111111437. The reversal of 12111111403 is 30411111121.

It is a cyclic number.

It is not a de Polignac number, because 12111111403 - 2⁵ = 12111111371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111115403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445251 + ... + 471667.

It is an arithmetic number, because the mean of its divisors is an integer number (816633216).

Almost surely, 2^12111111403 is an apocalyptic number.

12111111403 is a deficient number, since it is larger than the sum of its proper divisors (955020053).

12111111403 is a wasteful number, since it uses less digits than its factorization.

12111111403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27114.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 12111111403 its reverse (30411111121), we get a palindrome (42522222524).

The spelling of 12111111403 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, four hundred three".