12121121103 has 16 divisors (see below), whose sum is σ = 19891070976. Its totient is φ = 6393558240.

The previous prime is 12121121087. The next prime is 12121121113. The reversal of 12121121103 is 30112112121.

It is not a de Polignac number, because 12121121103 - 2⁴ = 12121121087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121121113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22199583 + ... + 22200128.

It is an arithmetic number, because the mean of its divisors is an integer number (1243191936).

Almost surely, 2^12121121103 is an apocalyptic number.

12121121103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12121121103 is a deficient number, since it is larger than the sum of its proper divisors (7769949873).

12121121103 is a wasteful number, since it uses less digits than its factorization.

12121121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44399734.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12121121103 its reverse (30112112121), we get a palindrome (42233233224).

The spelling of 12121121103 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred three".