1001100129 has 4 divisors (see below), whose sum is σ = 1334800176. Its totient is φ = 667400084.

The previous prime is 1001100127. The next prime is 1001100137. The reversal of 1001100129 is 9210011001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001100129 - 2¹ = 1001100127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001100127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 166850019 + ... + 166850024.

It is an arithmetic number, because the mean of its divisors is an integer number (333700044).

Almost surely, 2^1001100129 is an apocalyptic number.

It is an amenable number.

1001100129 is a deficient number, since it is larger than the sum of its proper divisors (333700047).

1001100129 is an equidigital number, since it uses as much as digits as its factorization.

1001100129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333700046.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 1001100129 is about 31640.1663870467. The cubic root of 1001100129 is about 1000.3665752728.

The spelling of 1001100129 in words is "one billion, one million, one hundred thousand, one hundred twenty-nine".