111311323212221 has 4 divisors (see below), whose sum is σ = 121430534413344. Its totient is φ = 101192112011100.

The previous prime is 111311323212217. The next prime is 111311323212283. The reversal of 111311323212221 is 122212323113111.

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 not a de Polignac number, because 111311323212221 - 2² = 111311323212217 is a prime.

It is a super-3 number, since 3×111311323212221³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311223212221) 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, 5059605600545 + ... + 5059605600566.

It is an arithmetic number, because the mean of its divisors is an integer number (30357633603336).

Almost surely, 2^{111311323212221} is an apocalyptic number.

111311323212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111311323212221 is a deficient number, since it is larger than the sum of its proper divisors (10119211201123).

111311323212221 is a wasteful number, since it uses less digits than its factorization.

111311323212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10119211201122.

The product of its digits is 864, while the sum is 26.

Adding to 111311323212221 its reverse (122212323113111), we get a palindrome (233523646325332).

The spelling of 111311323212221 in words is "one hundred eleven trillion, three hundred eleven billion, three hundred twenty-three million, two hundred twelve thousand, two hundred twenty-one".