1320066221 has 8 divisors (see below), whose sum is σ = 1337731200. Its totient is φ = 1302425280.

The previous prime is 1320066199. The next prime is 1320066229. The reversal of 1320066221 is 1226600231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320066221 - 2⁶ = 1320066157 is a prime.

It is a super-3 number, since 3×1320066221³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320066229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122741 + ... + 133061.

It is an arithmetic number, because the mean of its divisors is an integer number (167216400).

Almost surely, 2^1320066221 is an apocalyptic number.

It is an amenable number.

1320066221 is a deficient number, since it is larger than the sum of its proper divisors (17664979).

1320066221 is a wasteful number, since it uses less digits than its factorization.

1320066221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12019.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1320066221 is about 36332.7155742590. The cubic root of 1320066221 is about 1096.9796540876.

Adding to 1320066221 its reverse (1226600231), we get a palindrome (2546666452).

The spelling of 1320066221 in words is "one billion, three hundred twenty million, sixty-six thousand, two hundred twenty-one".