1321100135 has 8 divisors (see below), whose sum is σ = 1589890896. Its totient is φ = 1053832960.

The previous prime is 1321100129. The next prime is 1321100149. The reversal of 1321100135 is 5310011231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321100135 - 2¹⁶ = 1321034599 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 378986 + ... + 382455.

It is an arithmetic number, because the mean of its divisors is an integer number (198736362).

Almost surely, 2^1321100135 is an apocalyptic number.

1321100135 is a deficient number, since it is larger than the sum of its proper divisors (268790761).

1321100135 is an equidigital number, since it uses as much as digits as its factorization.

1321100135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761793.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1321100135 is about 36346.9412055540. The cubic root of 1321100135 is about 1097.2659747344.

Adding to 1321100135 its reverse (5310011231), we get a palindrome (6631111366).

The spelling of 1321100135 in words is "one billion, three hundred twenty-one million, one hundred thousand, one hundred thirty-five".