111020202101 has 4 divisors (see below), whose sum is σ = 111110537100. Its totient is φ = 110929867104.

The previous prime is 111020202031. The next prime is 111020202103. The reversal of 111020202101 is 101202020111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101202020111 = 268819 ⋅376469.

It can be written as a sum of positive squares in 2 ways, for example, as 103844418001 + 7175784100 = 322249^2 + 84710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020202101 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 (111020202103) 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, 45165656 + ... + 45168113.

It is an arithmetic number, because the mean of its divisors is an integer number (27777634275).

Almost surely, 2^111020202101 is an apocalyptic number.

It is an amenable number.

111020202101 is a deficient number, since it is larger than the sum of its proper divisors (90334999).

111020202101 is an equidigital number, since it uses as much as digits as its factorization.

111020202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90334998.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111020202101 its reverse (101202020111), we get a palindrome (212222222212).

The spelling of 111020202101 in words is "one hundred eleven billion, twenty million, two hundred two thousand, one hundred one".