12155012430 has 32 divisors (see below), whose sum is σ = 31824033408. Its totient is φ = 2946669600.

The previous prime is 12155012399. The next prime is 12155012437. The reversal of 12155012430 is 3421055121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12155012430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155012437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18416356 + ... + 18417015.

It is an arithmetic number, because the mean of its divisors is an integer number (994501044).

Almost surely, 2^12155012430 is an apocalyptic number.

12155012430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12155012430 is an abundant number, since it is smaller than the sum of its proper divisors (19669020978).

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

12155012430 is a wasteful number, since it uses less digits than its factorization.

12155012430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36833392.

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

Adding to 12155012430 its reverse (3421055121), we get a palindrome (15576067551).

The spelling of 12155012430 in words is "twelve billion, one hundred fifty-five million, twelve thousand, four hundred thirty".