111101220201121 has 4 divisors (see below), whose sum is σ = 113197469638932. Its totient is φ = 109004970763312.

The previous prime is 111101220201109. The next prime is 111101220201143. The reversal of 111101220201121 is 121102022101111.

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 92710631220496 + 18390588980625 = 9628636^2 + 4288425^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101220201121 - 2³¹ = 111099072717473 is a prime.

It is a super-2 number, since 2×111101220201121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111101220201095 and 111101220201104.

It is not an unprimeable number, because it can be changed into a prime (111101220201151) 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, 1048124718826 + ... + 1048124718931.

It is an arithmetic number, because the mean of its divisors is an integer number (28299367409733).

Almost surely, 2^{111101220201121} is an apocalyptic number.

It is an amenable number.

111101220201121 is a deficient number, since it is larger than the sum of its proper divisors (2096249437811).

111101220201121 is an equidigital number, since it uses as much as digits as its factorization.

111101220201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096249437810.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111101220201121 its reverse (121102022101111), we get a palindrome (232203242302232).

The spelling of 111101220201121 in words is "one hundred eleven trillion, one hundred one billion, two hundred twenty million, two hundred one thousand, one hundred twenty-one".