201102111101 has 4 divisors (see below), whose sum is σ = 201104367804. Its totient is φ = 201099854400.

The previous prime is 201102111073. The next prime is 201102111137. The reversal of 201102111101 is 101111201102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101111201102 = 2 ⋅50555600551.

It can be written as a sum of positive squares in 2 ways, for example, as 12116285476 + 188985825625 = 110074^2 + 434725^2 .

It is a cyclic number.

It is not a de Polignac number, because 201102111101 - 2²² = 201097916797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102111191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988940 + ... + 1174821.

It is an arithmetic number, because the mean of its divisors is an integer number (50276091951).

Almost surely, 2^201102111101 is an apocalyptic number.

It is an amenable number.

201102111101 is a deficient number, since it is larger than the sum of its proper divisors (2256703).

201102111101 is an equidigital number, since it uses as much as digits as its factorization.

201102111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256702.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 201102111101 its reverse (101111201102), we get a palindrome (302213312203).

Subtracting from 201102111101 its reverse (101111201102), we obtain a palindrome (99990909999).

The spelling of 201102111101 in words is "two hundred one billion, one hundred two million, one hundred eleven thousand, one hundred one".