12121131103 has 4 divisors (see below), whose sum is σ = 12148742320. Its totient is φ = 12093519888.

The previous prime is 12121131007. The next prime is 12121131107. The reversal of 12121131103 is 30113112121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12121131103 - 2⁹ = 12121130591 is a prime.

It is a super-2 number, since 2×12121131103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121131107) 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 3 ways as a sum of consecutive naturals, for example, 13804950 + ... + 13805827.

It is an arithmetic number, because the mean of its divisors is an integer number (3037185580).

Almost surely, 2^12121131103 is an apocalyptic number.

12121131103 is a deficient number, since it is larger than the sum of its proper divisors (27611217).

12121131103 is an equidigital number, since it uses as much as digits as its factorization.

12121131103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27611216.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12121131103 its reverse (30113112121), we get a palindrome (42234243224).

The spelling of 12121131103 in words is "twelve billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred three".