12111442530 has 64 divisors (see below), whose sum is σ = 31941537408. Its totient is φ = 2914664960.

The previous prime is 12111442493. The next prime is 12111442537. The reversal of 12111442530 is 3524411121.

It is a self number, because there is not a number n which added to its sum of digits gives 12111442530.

It is not an unprimeable number, because it can be changed into a prime (12111442537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88737 + ... + 179156.

It is an arithmetic number, because the mean of its divisors is an integer number (499086522).

Almost surely, 2^12111442530 is an apocalyptic number.

12111442530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111442530 is an abundant number, since it is smaller than the sum of its proper divisors (19830094878).

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

12111442530 is a wasteful number, since it uses less digits than its factorization.

12111442530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268051.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 12111442530 its reverse (3524411121), we get a palindrome (15635853651).

The spelling of 12111442530 in words is "twelve billion, one hundred eleven million, four hundred forty-two thousand, five hundred thirty".