111321313221 has 32 divisors (see below), whose sum is σ = 157161191040. Its totient is φ = 70009804800.

The previous prime is 111321313189. The next prime is 111321313237. The reversal of 111321313221 is 122313123111.

It is not a de Polignac number, because 111321313221 - 2⁵ = 111321313189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111321313241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316941 + ... + 568413.

It is an arithmetic number, because the mean of its divisors is an integer number (4911287220).

Almost surely, 2^111321313221 is an apocalyptic number.

It is an amenable number.

111321313221 is a deficient number, since it is larger than the sum of its proper divisors (45839877819).

111321313221 is a wasteful number, since it uses less digits than its factorization.

111321313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251637.

The product of its digits is 216, while the sum is 21.

Adding to 111321313221 its reverse (122313123111), we get a palindrome (233634436332).

The spelling of 111321313221 in words is "one hundred eleven billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-one".