1320331223021 has 8 divisors (see below), whose sum is σ = 1341312753144. Its totient is φ = 1299500098560.

The previous prime is 1320331223011. The next prime is 1320331223053. The reversal of 1320331223021 is 1203221330231.

It can be written as a sum of positive squares in 4 ways, for example, as 155500900 + 1320175722121 = 12470^2 + 1148989^2 .

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 1320331223021 - 2³⁸ = 1045453316077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320331223011) 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, 37583720 + ... + 37618833.

It is an arithmetic number, because the mean of its divisors is an integer number (167664094143).

Almost surely, 2^{1320331223021} is an apocalyptic number.

It is an amenable number.

1320331223021 is a deficient number, since it is larger than the sum of its proper divisors (20981530123).

1320331223021 is an equidigital number, since it uses as much as digits as its factorization.

1320331223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75202831.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1320331223021 its reverse (1203221330231), we get a palindrome (2523552553252).

The spelling of 1320331223021 in words is "one trillion, three hundred twenty billion, three hundred thirty-one million, two hundred twenty-three thousand, twenty-one".