111012220012021 has 4 divisors (see below), whose sum is σ = 111046599767500. Its totient is φ = 110977840256544.

The previous prime is 111012220012013. The next prime is 111012220012049. The reversal of 111012220012021 is 120210022210111.

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 15248165912100 + 95764054099921 = 3904890^2 + 9785911^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012220012021 - 2³ = 111012220012013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111012220011986 and 111012220012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012220012321) 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, 17189872896 + ... + 17189879353.

It is an arithmetic number, because the mean of its divisors is an integer number (27761649941875).

Almost surely, 2^{111012220012021} is an apocalyptic number.

It is an amenable number.

111012220012021 is a deficient number, since it is larger than the sum of its proper divisors (34379755479).

111012220012021 is an equidigital number, since it uses as much as digits as its factorization.

111012220012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34379755478.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111012220012021 its reverse (120210022210111), we get a palindrome (231222242222132).

The spelling of 111012220012021 in words is "one hundred eleven trillion, twelve billion, two hundred twenty million, twelve thousand, twenty-one".