1321213230321 has 48 divisors (see below), whose sum is σ = 1883007612864. Its totient is φ = 821164796928.

The previous prime is 1321213230277. The next prime is 1321213230329. The reversal of 1321213230321 is 1230323121231.

It is not a de Polignac number, because 1321213230321 - 2¹⁵ = 1321213197553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321213230291 and 1321213230300.

It is not an unprimeable number, because it can be changed into a prime (1321213230329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 462446325 + ... + 462449181.

It is an arithmetic number, because the mean of its divisors is an integer number (39229325268).

Almost surely, 2^{1321213230321} is an apocalyptic number.

It is an amenable number.

1321213230321 is a deficient number, since it is larger than the sum of its proper divisors (561794382543).

1321213230321 is a wasteful number, since it uses less digits than its factorization.

1321213230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1321213230321 its reverse (1230323121231), we get a palindrome (2551536351552).

The spelling of 1321213230321 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, two hundred thirty thousand, three hundred twenty-one".