20110011201091 has 12 divisors (see below), whose sum is σ = 23393383514928. Its totient is φ = 17237074957872.

The previous prime is 20110011201073. The next prime is 20110011201101. The reversal of 20110011201091 is 19010211001102.

It is not a de Polignac number, because 20110011201091 - 2³³ = 20101421266499 is a prime.

It is a super-3 number, since 3×20110011201091³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20110011201011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11881890 + ... + 13468456.

It is an arithmetic number, because the mean of its divisors is an integer number (1949448626244).

Almost surely, 2^{20110011201091} is an apocalyptic number.

20110011201091 is a deficient number, since it is larger than the sum of its proper divisors (3283372313837).

20110011201091 is a wasteful number, since it uses less digits than its factorization.

20110011201091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845258 (or 1845251 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 20110011201091 its reverse (19010211001102), we get a palindrome (39120222202193).

The spelling of 20110011201091 in words is "twenty trillion, one hundred ten billion, eleven million, two hundred one thousand, ninety-one".