12121112013 has 8 divisors (see below), whose sum is σ = 17112158208. Its totient is φ = 7605403584.

The previous prime is 12121111927. The next prime is 12121112027. The reversal of 12121112013 is 31021112121.

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

It is not a de Polignac number, because 12121112013 - 2¹³ = 12121103821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121111983 and 12121112001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121112083) 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, 118834381 + ... + 118834482.

It is an arithmetic number, because the mean of its divisors is an integer number (2139019776).

Almost surely, 2^12121112013 is an apocalyptic number.

It is an amenable number.

12121112013 is a deficient number, since it is larger than the sum of its proper divisors (4991046195).

12121112013 is a wasteful number, since it uses less digits than its factorization.

12121112013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237668883.

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

Adding to 12121112013 its reverse (31021112121), we get a palindrome (43142224134).

The spelling of 12121112013 in words is "twelve billion, one hundred twenty-one million, one hundred twelve thousand, thirteen".