12346121536 has 84 divisors (see below), whose sum is σ = 28562198400. Its totient is φ = 5279506176.

The previous prime is 12346121521. The next prime is 12346121537. The reversal of 12346121536 is 63512164321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12346121537) 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 11 ways as a sum of consecutive naturals, for example, 1498035 + ... + 1506253.

Almost surely, 2^12346121536 is an apocalyptic number.

12346121536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12346121536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14281099200).

12346121536 is an abundant number, since it is smaller than the sum of its proper divisors (16216076864).

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

12346121536 is an equidigital number, since it uses as much as digits as its factorization.

12346121536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724 (or 8707 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

Adding to 12346121536 its reverse (63512164321), we get a palindrome (75858285857).

The spelling of 12346121536 in words is "twelve billion, three hundred forty-six million, one hundred twenty-one thousand, five hundred thirty-six".