1321103213 has 8 divisors (see below), whose sum is σ = 1361826432. Its totient is φ = 1280905696.

The previous prime is 1321103209. The next prime is 1321103249. The reversal of 1321103213 is 3123011231.

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 1321103213 - 2² = 1321103209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321103191 and 1321103200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321103293) 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, 126320 + ... + 136377.

It is an arithmetic number, because the mean of its divisors is an integer number (170228304).

Almost surely, 2^1321103213 is an apocalyptic number.

It is an amenable number.

1321103213 is a deficient number, since it is larger than the sum of its proper divisors (40723219).

1321103213 is a wasteful number, since it uses less digits than its factorization.

1321103213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262851.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1321103213 is about 36346.9835474692. The cubic root of 1321103213 is about 1097.2668268984.

Adding to 1321103213 its reverse (3123011231), we get a palindrome (4444114444).

The spelling of 1321103213 in words is "one billion, three hundred twenty-one million, one hundred three thousand, two hundred thirteen".