1320144221 has 4 divisors (see below), whose sum is σ = 1440157344. Its totient is φ = 1200131100.

The previous prime is 1320144211. The next prime is 1320144223. The reversal of 1320144221 is 1224410231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1224410231 = 11 ⋅111310021.

It is a cyclic number.

It is not a de Polignac number, because 1320144221 - 2⁶ = 1320144157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320144193 and 1320144202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320144223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60006545 + ... + 60006566.

It is an arithmetic number, because the mean of its divisors is an integer number (360039336).

Almost surely, 2^1320144221 is an apocalyptic number.

1320144221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1320144221 is a deficient number, since it is larger than the sum of its proper divisors (120013123).

1320144221 is a wasteful number, since it uses less digits than its factorization.

1320144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120013122.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1320144221 is about 36333.7889711492. The cubic root of 1320144221 is about 1097.0012597531.

Adding to 1320144221 its reverse (1224410231), we get a palindrome (2544554452).

It can be divided in two parts, 1320 and 144221, that added together give a palindrome (145541).

The spelling of 1320144221 in words is "one billion, three hundred twenty million, one hundred forty-four thousand, two hundred twenty-one".