111101220020101 has 4 divisors (see below), whose sum is σ = 111386827269900. Its totient is φ = 110815612770304.

The previous prime is 111101220020069. The next prime is 111101220020117. The reversal of 111101220020101 is 101020022101111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42951324483076 + 68149895537025 = 6553726^2 + 8255295^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101220020101 - 2⁵ = 111101220020069 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 (111101220020501) 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, 142803624316 + ... + 142803625093.

It is an arithmetic number, because the mean of its divisors is an integer number (27846706817475).

Almost surely, 2^{111101220020101} is an apocalyptic number.

It is an amenable number.

111101220020101 is a deficient number, since it is larger than the sum of its proper divisors (285607249799).

111101220020101 is an equidigital number, since it uses as much as digits as its factorization.

111101220020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285607249798.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111101220020101 its reverse (101020022101111), we get a palindrome (212121242121212).

The spelling of 111101220020101 in words is "one hundred eleven trillion, one hundred one billion, two hundred twenty million, twenty thousand, one hundred one".