12421111015 has 32 divisors (see below), whose sum is σ = 16426206720. Its totient is φ = 8974779264.

The previous prime is 12421110983. The next prime is 12421111019. The reversal of 12421111015 is 51011112421.

It is a cyclic number.

It is not a de Polignac number, because 12421111015 - 2⁵ = 12421110983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 12421110983 and 12421111001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421111019) 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 31 ways as a sum of consecutive naturals, for example, 661537 + ... + 680053.

It is an arithmetic number, because the mean of its divisors is an integer number (513318960).

Almost surely, 2^12421111015 is an apocalyptic number.

12421111015 is a deficient number, since it is larger than the sum of its proper divisors (4005095705).

12421111015 is a wasteful number, since it uses less digits than its factorization.

12421111015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 12421111015 its reverse (51011112421), we get a palindrome (63432223436).

The spelling of 12421111015 in words is "twelve billion, four hundred twenty-one million, one hundred eleven thousand, fifteen".