111102110212021 has 4 divisors (see below), whose sum is σ = 112350448529100. Its totient is φ = 109853771894944.

The previous prime is 111102110211997. The next prime is 111102110212117. The reversal of 111102110212021 is 120212011201111.

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 79576569124900 + 31525541087121 = 8920570^2 + 5614761^2 .

It is a cyclic number.

It is not a de Polignac number, because 111102110212021 - 2¹³ = 111102110203829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111102110211986 and 111102110212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102110212421) 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, 624169158406 + ... + 624169158583.

It is an arithmetic number, because the mean of its divisors is an integer number (28087612132275).

Almost surely, 2^{111102110212021} is an apocalyptic number.

It is an amenable number.

111102110212021 is a deficient number, since it is larger than the sum of its proper divisors (1248338317079).

111102110212021 is an equidigital number, since it uses as much as digits as its factorization.

111102110212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248338317078.

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

Adding to 111102110212021 its reverse (120212011201111), we get a palindrome (231314121413132).

The spelling of 111102110212021 in words is "one hundred eleven trillion, one hundred two billion, one hundred ten million, two hundred twelve thousand, twenty-one".