1244213113 has 24 divisors (see below), whose sum is σ = 1479828224. Its totient is φ = 1039119840.

The previous prime is 1244213111. The next prime is 1244213123. The reversal of 1244213113 is 3113124421.

It is not a de Polignac number, because 1244213113 - 2¹ = 1244213111 is a prime.

It is a super-2 number, since 2×1244213113² = 3096132541122301538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244213111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349006 + ... + 352552.

Almost surely, 2^1244213113 is an apocalyptic number.

1244213113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1244213113 is a deficient number, since it is larger than the sum of its proper divisors (235615111).

1244213113 is a wasteful number, since it uses less digits than its factorization.

1244213113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805 (or 3794 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1244213113 is about 35273.4051801070. The cubic root of 1244213113 is about 1075.5524437946.

Adding to 1244213113 its reverse (3113124421), we get a palindrome (4357337534).

The spelling of 1244213113 in words is "one billion, two hundred forty-four million, two hundred thirteen thousand, one hundred thirteen".