20111201120091 has 8 divisors (see below), whose sum is σ = 26868244838400. Its totient is φ = 13380812407592.

The previous prime is 20111201120033. The next prime is 20111201120107. The reversal of 20111201120091 is 19002110211102.

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

It is a cyclic number.

It is not a de Polignac number, because 20111201120091 - 2⁶ = 20111201120027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111201128091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6663749691 + ... + 6663752708.

It is an arithmetic number, because the mean of its divisors is an integer number (3358530604800).

Almost surely, 2^{20111201120091} is an apocalyptic number.

20111201120091 is a deficient number, since it is larger than the sum of its proper divisors (6757043718309).

20111201120091 is a wasteful number, since it uses less digits than its factorization.

20111201120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13327502905.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 20111201120091 its reverse (19002110211102), we get a palindrome (39113311331193).

The spelling of 20111201120091 in words is "twenty trillion, one hundred eleven billion, two hundred one million, one hundred twenty thousand, ninety-one".