1321533105 has 16 divisors (see below), whose sum is σ = 2115270720. Its totient is φ = 704545088.

The previous prime is 1321533091. The next prime is 1321533119. The reversal of 1321533105 is 5013351231.

It is an interprime number because it is at equal distance from previous prime (1321533091) and next prime (1321533119).

It is a cyclic number.

It is not a de Polignac number, because 1321533105 - 2⁷ = 1321532977 is a prime.

It is a super-2 number, since 2×1321533105² = 3492899495221882050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26659 + ... + 57911.

It is an arithmetic number, because the mean of its divisors is an integer number (132204420).

Almost surely, 2^1321533105 is an apocalyptic number.

1321533105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321533105 is a deficient number, since it is larger than the sum of its proper divisors (793737615).

1321533105 is a wasteful number, since it uses less digits than its factorization.

1321533105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34080.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1321533105 is about 36352.8967896645. The cubic root of 1321533105 is about 1097.3858322545.

Adding to 1321533105 its reverse (5013351231), we get a palindrome (6334884336).

The spelling of 1321533105 in words is "one billion, three hundred twenty-one million, five hundred thirty-three thousand, one hundred five".