12562121416 has 64 divisors (see below), whose sum is σ = 26606805120. Its totient is φ = 5516881920.

The previous prime is 12562121357. The next prime is 12562121419. The reversal of 12562121416 is 61412126521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12562121419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448051 + ... + 475261.

It is an arithmetic number, because the mean of its divisors is an integer number (415731330).

Almost surely, 2^12562121416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12562121416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13303402560).

12562121416 is an abundant number, since it is smaller than the sum of its proper divisors (14044683704).

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

12562121416 is a wasteful number, since it uses less digits than its factorization.

12562121416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27446 (or 27442 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

Adding to 12562121416 its reverse (61412126521), we get a palindrome (73974247937).

The spelling of 12562121416 in words is "twelve billion, five hundred sixty-two million, one hundred twenty-one thousand, four hundred sixteen".