1213444201 has 4 divisors (see below), whose sum is σ = 1219797504. Its totient is φ = 1207090900.

The previous prime is 1213444181. The next prime is 1213444237. The reversal of 1213444201 is 1024443121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213444201 - 2²⁵ = 1179889769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213444901) 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 in 3 ways as a sum of consecutive naturals, for example, 3176365 + ... + 3176746.

It is an arithmetic number, because the mean of its divisors is an integer number (304949376).

Almost surely, 2^1213444201 is an apocalyptic number.

It is an amenable number.

1213444201 is a deficient number, since it is larger than the sum of its proper divisors (6353303).

1213444201 is an equidigital number, since it uses as much as digits as its factorization.

1213444201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6353302.

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

The square root of 1213444201 is about 34834.5259907466. The cubic root of 1213444201 is about 1066.6123391059.

Adding to 1213444201 its reverse (1024443121), we get a palindrome (2237887322).

The spelling of 1213444201 in words is "one billion, two hundred thirteen million, four hundred forty-four thousand, two hundred one".