12155134422 has 16 divisors (see below), whose sum is σ = 24350860800. Its totient is φ = 4044946152.

The previous prime is 12155134421. The next prime is 12155134457. The reversal of 12155134422 is 22443155121.

It is a self number, because there is not a number n which added to its sum of digits gives 12155134422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155134421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687438 + ... + 1694625.

It is an arithmetic number, because the mean of its divisors is an integer number (1521928800).

Almost surely, 2^12155134422 is an apocalyptic number.

12155134422 is an abundant number, since it is smaller than the sum of its proper divisors (12195726378).

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

12155134422 is a wasteful number, since it uses less digits than its factorization.

12155134422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382667.

The product of its digits is 9600, while the sum is 30.

Adding to 12155134422 its reverse (22443155121), we get a palindrome (34598289543).

The spelling of 12155134422 in words is "twelve billion, one hundred fifty-five million, one hundred thirty-four thousand, four hundred twenty-two".