12420321015 has 8 divisors (see below), whose sum is σ = 19872513648. Its totient is φ = 6624171200.

The previous prime is 12420320933. The next prime is 12420321037. The reversal of 12420321015 is 51012302421.

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

It is not a de Polignac number, because 12420321015 - 2¹⁰ = 12420319991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12420320982 and 12420321000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414010686 + ... + 414010715.

It is an arithmetic number, because the mean of its divisors is an integer number (2484064206).

Almost surely, 2^12420321015 is an apocalyptic number.

12420321015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12420321015 is a deficient number, since it is larger than the sum of its proper divisors (7452192633).

12420321015 is an equidigital number, since it uses as much as digits as its factorization.

12420321015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828021409.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12420321015 its reverse (51012302421), we get a palindrome (63432623436).

The spelling of 12420321015 in words is "twelve billion, four hundred twenty million, three hundred twenty-one thousand, fifteen".