111221313203221 has 24 divisors (see below), whose sum is σ = 123349718301696. Its totient is φ = 100201359360960.

The previous prime is 111221313203207. The next prime is 111221313203239. The reversal of 111221313203221 is 122302313122111.

It is not a de Polignac number, because 111221313203221 - 2¹³ = 111221313195029 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 (111221313203201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30795105 + ... + 34216678.

It is an arithmetic number, because the mean of its divisors is an integer number (5139571595904).

Almost surely, 2^{111221313203221} is an apocalyptic number.

It is an amenable number.

111221313203221 is a deficient number, since it is larger than the sum of its proper divisors (12128405098475).

111221313203221 is a wasteful number, since it uses less digits than its factorization.

111221313203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65012053 (or 65012040 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 111221313203221 its reverse (122302313122111), we get a palindrome (233523626325332).

The spelling of 111221313203221 in words is "one hundred eleven trillion, two hundred twenty-one billion, three hundred thirteen million, two hundred three thousand, two hundred twenty-one".