12045220451 has 16 divisors (see below), whose sum is σ = 13715682048. Its totient is φ = 10470952800.

The previous prime is 12045220379. The next prime is 12045220457. The reversal of 12045220451 is 15402254021.

It is not a de Polignac number, because 12045220451 - 2²² = 12041026147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12045220451.

It is not an unprimeable number, because it can be changed into a prime (12045220457) 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, 1320416 + ... + 1329506.

It is an arithmetic number, because the mean of its divisors is an integer number (857230128).

Almost surely, 2^12045220451 is an apocalyptic number.

12045220451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12045220451 is a deficient number, since it is larger than the sum of its proper divisors (1670461597).

12045220451 is a wasteful number, since it uses less digits than its factorization.

12045220451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14362.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 12045220451 its reverse (15402254021), we get a palindrome (27447474472).

The spelling of 12045220451 in words is "twelve billion, forty-five million, two hundred twenty thousand, four hundred fifty-one".