111010020221 has 4 divisors (see below), whose sum is σ = 111808653600. Its totient is φ = 110211386844.

The previous prime is 111010020203. The next prime is 111010020227. The reversal of 111010020221 is 122020010111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111010020221 - 2¹⁸ = 111009758077 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 (111010020227) 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, 399316481 + ... + 399316758.

It is an arithmetic number, because the mean of its divisors is an integer number (27952163400).

Almost surely, 2^111010020221 is an apocalyptic number.

It is an amenable number.

111010020221 is a deficient number, since it is larger than the sum of its proper divisors (798633379).

111010020221 is an equidigital number, since it uses as much as digits as its factorization.

111010020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798633378.

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

Adding to 111010020221 its reverse (122020010111), we get a palindrome (233030030332).

The spelling of 111010020221 in words is "one hundred eleven billion, ten million, twenty thousand, two hundred twenty-one".