1213244401 has 2 divisors, whose sum is σ = 1213244402. Its totient is φ = 1213244400.

The previous prime is 1213244399. The next prime is 1213244429. The reversal of 1213244401 is 1044423121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 884765025 + 328479376 = 29745^2 + 18124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213244401 - 2¹ = 1213244399 is a prime.

Together with 1213244399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1213244801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606622200 + 606622201.

It is an arithmetic number, because the mean of its divisors is an integer number (606622201).

Almost surely, 2^1213244401 is an apocalyptic number.

It is an amenable number.

1213244401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213244401 is an equidigital number, since it uses as much as digits as its factorization.

1213244401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1213244401 is about 34831.6580282937. The cubic root of 1213244401 is about 1066.5537947732.

Adding to 1213244401 its reverse (1044423121), we get a palindrome (2257667522).

The spelling of 1213244401 in words is "one billion, two hundred thirteen million, two hundred forty-four thousand, four hundred one".