1321100105 has 32 divisors (see below), whose sum is σ = 1786579200. Its totient is φ = 930504960.

The previous prime is 1321100087. The next prime is 1321100113. The reversal of 1321100105 is 5010011231.

It is not a de Polignac number, because 1321100105 - 2⁶ = 1321100041 is a prime.

It is a super-2 number, since 2×1321100105² = 3490610974862022050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1321100105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628346 + ... + 630444.

It is an arithmetic number, because the mean of its divisors is an integer number (55830600).

Almost surely, 2^1321100105 is an apocalyptic number.

It is an amenable number.

1321100105 is a deficient number, since it is larger than the sum of its proper divisors (465479095).

1321100105 is a wasteful number, since it uses less digits than its factorization.

1321100105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 1321100105 is about 36346.9407928645. The cubic root of 1321100105 is about 1097.2659664287.

Adding to 1321100105 its reverse (5010011231), we get a palindrome (6331111336).

The spelling of 1321100105 in words is "one billion, three hundred twenty-one million, one hundred thousand, one hundred five".