12516022021 has 8 divisors (see below), whose sum is σ = 12533241600. Its totient is φ = 12498817440.

The previous prime is 12516022003. The next prime is 12516022049. The reversal of 12516022021 is 12022061521.

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

It is a cyclic number.

It is not a de Polignac number, because 12516022021 - 2⁷ = 12516021893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12516021983 and 12516022001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516022091) 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, 3183585 + ... + 3187513.

It is an arithmetic number, because the mean of its divisors is an integer number (1566655200).

Almost surely, 2^12516022021 is an apocalyptic number.

It is an amenable number.

12516022021 is a deficient number, since it is larger than the sum of its proper divisors (17219579).

12516022021 is a wasteful number, since it uses less digits than its factorization.

12516022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7499.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 12516022021 its reverse (12022061521), we get a palindrome (24538083542).

The spelling of 12516022021 in words is "twelve billion, five hundred sixteen million, twenty-two thousand, twenty-one".