1321213330323 has 20 divisors (see below), whose sum is σ = 1973706311368. Its totient is φ = 880790163840.

The previous prime is 1321213330321. The next prime is 1321213330331. The reversal of 1321213330323 is 3230333121231.

1321213330323 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 2 + 1 + 3 + 330 + 323 = 666.

It is not a de Polignac number, because 1321213330323 - 2¹ = 1321213330321 is a prime.

It is a super-2 number, since 2×1321213330323² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321213330321) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4401315 + ... + 4691907.

Almost surely, 2^{1321213330323} is an apocalyptic number.

1321213330323 is a deficient number, since it is larger than the sum of its proper divisors (652492981045).

1321213330323 is an equidigital number, since it uses as much as digits as its factorization.

1321213330323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346736 (or 346727 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 1321213330323 its reverse (3230333121231), we get a palindrome (4551546451554).

The spelling of 1321213330323 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, three hundred thirty thousand, three hundred twenty-three".