1244211213 has 16 divisors (see below), whose sum is σ = 1936281600. Its totient is φ = 695850096.

The previous prime is 1244211203. The next prime is 1244211217. The reversal of 1244211213 is 3121124421.

It is not a de Polignac number, because 1244211213 - 2⁹ = 1244210701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1244211213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629313 + ... + 631286.

It is an arithmetic number, because the mean of its divisors is an integer number (121017600).

Almost surely, 2^1244211213 is an apocalyptic number.

It is an amenable number.

1244211213 is a deficient number, since it is larger than the sum of its proper divisors (692070387).

1244211213 is a wasteful number, since it uses less digits than its factorization.

1244211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260656.

The product of its digits is 384, while the sum is 21.

The square root of 1244211213 is about 35273.3782476247. The cubic root of 1244211213 is about 1075.5518963131.

Adding to 1244211213 its reverse (3121124421), we get a palindrome (4365335634).

The spelling of 1244211213 in words is "one billion, two hundred forty-four million, two hundred eleven thousand, two hundred thirteen".