1444223121 has 16 divisors (see below), whose sum is σ = 2101394880. Its totient is φ = 874992320.

The previous prime is 1444223089. The next prime is 1444223147. The reversal of 1444223121 is 1213224441.

It is a cyclic number.

It is not a de Polignac number, because 1444223121 - 2⁵ = 1444223089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1444223091 and 1444223100.

It is not an unprimeable number, because it can be changed into a prime (1444223161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131095 + ... + 141683.

It is an arithmetic number, because the mean of its divisors is an integer number (131337180).

Almost surely, 2^1444223121 is an apocalyptic number.

1444223121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1444223121 is a deficient number, since it is larger than the sum of its proper divisors (657171759).

1444223121 is a wasteful number, since it uses less digits than its factorization.

1444223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14736.

The product of its digits is 1536, while the sum is 24.

The square root of 1444223121 is about 38002.9356892333. The cubic root of 1444223121 is about 1130.3460764200.

Adding to 1444223121 its reverse (1213224441), we get a palindrome (2657447562).

The spelling of 1444223121 in words is "one billion, four hundred forty-four million, two hundred twenty-three thousand, one hundred twenty-one".