1244422420251 has 16 divisors (see below), whose sum is σ = 1661432325120. Its totient is φ = 828514058400.

The previous prime is 1244422420249. The next prime is 1244422420261. The reversal of 1244422420251 is 1520242244421.

It is not a de Polignac number, because 1244422420251 - 2¹ = 1244422420249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1244422420261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16664385 + ... + 16738893.

It is an arithmetic number, because the mean of its divisors is an integer number (103839520320).

Almost surely, 2^{1244422420251} is an apocalyptic number.

1244422420251 is a deficient number, since it is larger than the sum of its proper divisors (417009904869).

1244422420251 is an equidigital number, since it uses as much as digits as its factorization.

1244422420251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81826.

The product of its (nonzero) digits is 40960, while the sum is 33.

Adding to 1244422420251 its reverse (1520242244421), we get a palindrome (2764664664672).

The spelling of 1244422420251 in words is "one trillion, two hundred forty-four billion, four hundred twenty-two million, four hundred twenty thousand, two hundred fifty-one".