12122121015 has 20 divisors (see below), whose sum is σ = 21730025064. Its totient is φ = 6465130992.

The previous prime is 12122121007. The next prime is 12122121071. The reversal of 12122121015 is 51012122121.

12122121015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12122121015 - 2³ = 12122121007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14965177 + ... + 14965986.

Almost surely, 2^12122121015 is an apocalyptic number.

12122121015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12122121015 is a deficient number, since it is larger than the sum of its proper divisors (9607904049).

12122121015 is an equidigital number, since it uses as much as digits as its factorization.

12122121015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29931180 (or 29931171 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12122121015 its reverse (51012122121), we get a palindrome (63134243136).

The spelling of 12122121015 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, fifteen".