1001201132091 has 4 divisors (see below), whose sum is σ = 1334934842792. Its totient is φ = 667467421392.

The previous prime is 1001201132089. The next prime is 1001201132119. The reversal of 1001201132091 is 1902311021001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1001201132091 - 2¹ = 1001201132089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001201132291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166866855346 + ... + 166866855351.

It is an arithmetic number, because the mean of its divisors is an integer number (333733710698).

Almost surely, 2^{1001201132091} is an apocalyptic number.

1001201132091 is a deficient number, since it is larger than the sum of its proper divisors (333733710701).

1001201132091 is an equidigital number, since it uses as much as digits as its factorization.

1001201132091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333733710700.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 1001201132091 its reverse (1902311021001), we get a palindrome (2903512153092).

The spelling of 1001201132091 in words is "one trillion, one billion, two hundred one million, one hundred thirty-two thousand, ninety-one".