12155113066 has 16 divisors (see below), whose sum is σ = 18508911840. Its totient is φ = 5985516240.

The previous prime is 12155113043. The next prime is 12155113073. The reversal of 12155113066 is 66031155121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901696 + ... + 915076.

It is an arithmetic number, because the mean of its divisors is an integer number (1156806990).

Almost surely, 2^12155113066 is an apocalyptic number.

12155113066 is a deficient number, since it is larger than the sum of its proper divisors (6353798774).

12155113066 is a wasteful number, since it uses less digits than its factorization.

12155113066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20229.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 12155113066 its reverse (66031155121), we get a palindrome (78186268187).

The spelling of 12155113066 in words is "twelve billion, one hundred fifty-five million, one hundred thirteen thousand, sixty-six".