201101022111091 has 4 divisors (see below), whose sum is σ = 201106528295032. Its totient is φ = 201095515927152.

The previous prime is 201101022111007. The next prime is 201101022111133. The reversal of 201101022111091 is 190111220101102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201101022111091 - 2⁹ = 201101022110579 is a prime.

It is a super-2 number, since 2×201101022111091² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201101022111491) 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, 2753037186 + ... + 2753110231.

It is an arithmetic number, because the mean of its divisors is an integer number (50276632073758).

Almost surely, 2^{201101022111091} is an apocalyptic number.

201101022111091 is a deficient number, since it is larger than the sum of its proper divisors (5506183941).

201101022111091 is an equidigital number, since it uses as much as digits as its factorization.

201101022111091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506183940.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 201101022111091 its reverse (190111220101102), we get a palindrome (391212242212193).

The spelling of 201101022111091 in words is "two hundred one trillion, one hundred one billion, twenty-two million, one hundred eleven thousand, ninety-one".