1320021223 has 4 divisors (see below), whose sum is σ = 1321330480. Its totient is φ = 1318711968.

The previous prime is 1320021169. The next prime is 1320021289. The reversal of 1320021223 is 3221200231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320021223 - 2²⁵ = 1286466791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320021197 and 1320021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320001223) 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, 653115 + ... + 655132.

It is an arithmetic number, because the mean of its divisors is an integer number (330332620).

Almost surely, 2^1320021223 is an apocalyptic number.

1320021223 is a deficient number, since it is larger than the sum of its proper divisors (1309257).

1320021223 is a wasteful number, since it uses less digits than its factorization.

1320021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309256.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1320021223 is about 36332.0963199208. The cubic root of 1320021223 is about 1096.9671894474.

Adding to 1320021223 its reverse (3221200231), we get a palindrome (4541221454).

It can be divided in two parts, 132002 and 1223, that added together give a square (133225 = 365²).

The spelling of 1320021223 in words is "one billion, three hundred twenty million, twenty-one thousand, two hundred twenty-three".