12155113103 has 4 divisors (see below), whose sum is σ = 13891557840. Its totient is φ = 10418668368.

The previous prime is 12155113097. The next prime is 12155113109. The reversal of 12155113103 is 30131155121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12155113097) and next prime (12155113109).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12155113103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155113109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868222358 + ... + 868222371.

It is an arithmetic number, because the mean of its divisors is an integer number (3472889460).

Almost surely, 2^12155113103 is an apocalyptic number.

12155113103 is a deficient number, since it is larger than the sum of its proper divisors (1736444737).

12155113103 is an equidigital number, since it uses as much as digits as its factorization.

12155113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736444736.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 12155113103 its reverse (30131155121), we get a palindrome (42286268224).

The spelling of 12155113103 in words is "twelve billion, one hundred fifty-five million, one hundred thirteen thousand, one hundred three".