12212121416 has 16 divisors (see below), whose sum is σ = 24979339440. Its totient is φ = 5550964240.

The previous prime is 12212121409. The next prime is 12212121433. The reversal of 12212121416 is 61412121221.

It is a junction number, because it is equal to n+sod(n) for n = 12212121391 and 12212121400.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 69386966 + ... + 69387141.

It is an arithmetic number, because the mean of its divisors is an integer number (1561208715).

Almost surely, 2^12212121416 is an apocalyptic number.

It is an amenable number.

12212121416 is an abundant number, since it is smaller than the sum of its proper divisors (12767218024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12212121416 is a wasteful number, since it uses less digits than its factorization.

12212121416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138774124 (or 138774120 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

Adding to 12212121416 its reverse (61412121221), we get a palindrome (73624242637).

The spelling of 12212121416 in words is "twelve billion, two hundred twelve million, one hundred twenty-one thousand, four hundred sixteen".