1244001121 has 12 divisors (see below), whose sum is σ = 1389797332. Its totient is φ = 1112364000.

The previous prime is 1244001091. The next prime is 1244001151. The reversal of 1244001121 is 1211004421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1244001091) and next prime (1244001151).

It can be written as a sum of positive squares in 2 ways, for example, as 671069025 + 572932096 = 25905^2 + 23936^2 .

It is not a de Polignac number, because 1244001121 - 2⁵ = 1244001089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244001095 and 1244001104.

It is not an unprimeable number, because it can be changed into a prime (1244001151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76890 + ... + 91651.

Almost surely, 2^1244001121 is an apocalyptic number.

1244001121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1244001121 is a deficient number, since it is larger than the sum of its proper divisors (145796211).

1244001121 is a wasteful number, since it uses less digits than its factorization.

1244001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168624 (or 168613 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1244001121 is about 35270.4000686128. The cubic root of 1244001121 is about 1075.4913552608.

Adding to 1244001121 its reverse (1211004421), we get a palindrome (2455005542).

It can be divided in two parts, 124400 and 1121, that added together give a palindrome (125521).

The spelling of 1244001121 in words is "one billion, two hundred forty-four million, one thousand, one hundred twenty-one".