1321102321 has 24 divisors (see below), whose sum is σ = 1676106432. Its totient is φ = 1019172000.

The previous prime is 1321102303. The next prime is 1321102333. The reversal of 1321102321 is 1232011231.

It is not a de Polignac number, because 1321102321 - 2⁹ = 1321101809 is a prime.

It is a super-2 number, since 2×1321102321² = 3490622685103174082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321102295 and 1321102304.

It is not an unprimeable number, because it can be changed into a prime (1321102301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77826 + ... + 93268.

It is an arithmetic number, because the mean of its divisors is an integer number (69837768).

Almost surely, 2^1321102321 is an apocalyptic number.

1321102321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321102321 is a deficient number, since it is larger than the sum of its proper divisors (355004111).

1321102321 is a wasteful number, since it uses less digits than its factorization.

1321102321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15573 (or 15562 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321102321 is about 36346.9712768478. The cubic root of 1321102321 is about 1097.2665799426.

Adding to 1321102321 its reverse (1232011231), we get a palindrome (2553113552).

It can be divided in two parts, 132110 and 2321, that added together give a palindrome (134431).

The spelling of 1321102321 in words is "one billion, three hundred twenty-one million, one hundred two thousand, three hundred twenty-one".