1321110505 has 32 divisors (see below), whose sum is σ = 1869356160. Its totient is φ = 883630080.

The previous prime is 1321110481. The next prime is 1321110523. The reversal of 1321110505 is 5050111231.

It is not a de Polignac number, because 1321110505 - 2²³ = 1312721897 is a prime.

It is a super-3 number, since 3×1321110505³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199081 + ... + 205609.

It is an arithmetic number, because the mean of its divisors is an integer number (58417380).

Almost surely, 2^1321110505 is an apocalyptic number.

It is an amenable number.

1321110505 is a deficient number, since it is larger than the sum of its proper divisors (548245655).

1321110505 is a wasteful number, since it uses less digits than its factorization.

1321110505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1321110505 is about 36347.0838582685. The cubic root of 1321110505 is about 1097.2688457301.

Adding to 1321110505 its reverse (5050111231), we get a palindrome (6371221736).

It can be divided in two parts, 13211 and 10505, that added together give a square (23716 = 154²).

The spelling of 1321110505 in words is "one billion, three hundred twenty-one million, one hundred ten thousand, five hundred five".