12442220451 has 6 divisors (see below), whose sum is σ = 17972096220. Its totient is φ = 8294813628.

The previous prime is 12442220437. The next prime is 12442220459. The reversal of 12442220451 is 15402224421.

It is a happy number.

12442220451 is a `hidden beast` number, since 12 + 442 + 2 + 204 + 5 + 1 = 666.

It is not a de Polignac number, because 12442220451 - 2¹¹ = 12442218403 is a prime.

It is a super-5 number, since 5×12442220451⁵ (a number of 52 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (12442220459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 691234461 + ... + 691234478.

It is an arithmetic number, because the mean of its divisors is an integer number (2995349370).

Almost surely, 2^12442220451 is an apocalyptic number.

12442220451 is a deficient number, since it is larger than the sum of its proper divisors (5529875769).

12442220451 is a wasteful number, since it uses less digits than its factorization.

12442220451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382468945 (or 1382468942 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 12442220451 its reverse (15402224421), we get a palindrome (27844444872).

The spelling of 12442220451 in words is "twelve billion, four hundred forty-two million, two hundred twenty thousand, four hundred fifty-one".