1213300321 has 4 divisors (see below), whose sum is σ = 1214716932. Its totient is φ = 1211883712.

The previous prime is 1213300307. The next prime is 1213300349. The reversal of 1213300321 is 1230033121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230033121 = 59 ⋅20848019.

It can be written as a sum of positive squares in 2 ways, for example, as 1086625296 + 126675025 = 32964^2 + 11255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213300321 - 2²⁷ = 1079082593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213300295 and 1213300304.

It is not an unprimeable number, because it can be changed into a prime (1213307321) 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, 707020 + ... + 708733.

It is an arithmetic number, because the mean of its divisors is an integer number (303679233).

Almost surely, 2^1213300321 is an apocalyptic number.

It is an amenable number.

1213300321 is a deficient number, since it is larger than the sum of its proper divisors (1416611).

1213300321 is an equidigital number, since it uses as much as digits as its factorization.

1213300321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416610.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1213300321 is about 34832.4607370768. The cubic root of 1213300321 is about 1066.5701808017.

Adding to 1213300321 its reverse (1230033121), we get a palindrome (2443333442).

The spelling of 1213300321 in words is "one billion, two hundred thirteen million, three hundred thousand, three hundred twenty-one".