12155102155 has 8 divisors (see below), whose sum is σ = 16669854432. Its totient is φ = 8334927168.

The previous prime is 12155102149. The next prime is 12155102159. The reversal of 12155102155 is 55120155121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12155102155 - 2³ = 12155102147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12155102159) 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, 173644282 + ... + 173644351.

It is an arithmetic number, because the mean of its divisors is an integer number (2083731804).

Almost surely, 2^12155102155 is an apocalyptic number.

12155102155 is a deficient number, since it is larger than the sum of its proper divisors (4514752277).

12155102155 is an equidigital number, since it uses as much as digits as its factorization.

12155102155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347288645.

The product of its (nonzero) digits is 2500, while the sum is 28.

Adding to 12155102155 its reverse (55120155121), we get a palindrome (67275257276).

The spelling of 12155102155 in words is "twelve billion, one hundred fifty-five million, one hundred two thousand, one hundred fifty-five".