12051320450 has 24 divisors (see below), whose sum is σ = 24139723188. Its totient is φ = 4449718080.

The previous prime is 12051320387. The next prime is 12051320453. The reversal of 12051320450 is 5402315021.

It can be written as a sum of positive squares in 6 ways, for example, as 765020281 + 11286300169 = 27659^2 + 106237^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12051320453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9269597 + ... + 9270896.

Almost surely, 2^12051320450 is an apocalyptic number.

12051320450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12051320450 is an abundant number, since it is smaller than the sum of its proper divisors (12088402738).

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

12051320450 is a wasteful number, since it uses less digits than its factorization.

12051320450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18540518 (or 18540513 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 12051320450 its reverse (5402315021), we get a palindrome (17453635471).

The spelling of 12051320450 in words is "twelve billion, fifty-one million, three hundred twenty thousand, four hundred fifty".