111123020101 has 4 divisors (see below), whose sum is σ = 111536117100. Its totient is φ = 110709923104.

The previous prime is 111123020027. The next prime is 111123020179. The reversal of 111123020101 is 101020321111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101020321111 = 41 ⋅2463910271.

It can be written as a sum of positive squares in 2 ways, for example, as 60306589476 + 50816430625 = 245574^2 + 225425^2 .

It is a cyclic number.

It is not a de Polignac number, because 111123020101 - 2¹⁵ = 111122987333 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 (111123020201) 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, 206548096 + ... + 206548633.

It is an arithmetic number, because the mean of its divisors is an integer number (27884029275).

Almost surely, 2^111123020101 is an apocalyptic number.

It is an amenable number.

111123020101 is a deficient number, since it is larger than the sum of its proper divisors (413096999).

111123020101 is an equidigital number, since it uses as much as digits as its factorization.

111123020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413096998.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111123020101 its reverse (101020321111), we get a palindrome (212143341212).

The spelling of 111123020101 in words is "one hundred eleven billion, one hundred twenty-three million, twenty thousand, one hundred one".