111011020101221 has 4 divisors (see below), whose sum is σ = 111011112813132. Its totient is φ = 111010927389312.

The previous prime is 111011020101169. The next prime is 111011020101277. The reversal of 111011020101221 is 122101020110111.

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 107453665752196 + 3557354349025 = 10365986^2 + 1886095^2 .

It is a cyclic number.

It is not a de Polignac number, because 111011020101221 - 2¹⁸ = 111011019839077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111011020101196 and 111011020101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011020100221) 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, 44536076 + ... + 46962581.

It is an arithmetic number, because the mean of its divisors is an integer number (27752778203283).

Almost surely, 2^{111011020101221} is an apocalyptic number.

It is an amenable number.

111011020101221 is a deficient number, since it is larger than the sum of its proper divisors (92711911).

111011020101221 is an equidigital number, since it uses as much as digits as its factorization.

111011020101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92711910.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111011020101221 its reverse (122101020110111), we get a palindrome (233112040211332).

The spelling of 111011020101221 in words is "one hundred eleven trillion, eleven billion, twenty million, one hundred one thousand, two hundred twenty-one".