111323212121 has 8 divisors (see below), whose sum is σ = 122645916288. Its totient is φ = 100200910000.

The previous prime is 111323212081. The next prime is 111323212123. The reversal of 111323212121 is 121212323111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111323212121 is a prime.

It is a super-3 number, since 3×111323212121³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111323212093 and 111323212102.

It is not an unprimeable number, because it can be changed into a prime (111323212123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50099345 + ... + 50101566.

It is an arithmetic number, because the mean of its divisors is an integer number (15330739536).

Almost surely, 2^111323212121 is an apocalyptic number.

111323212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111323212121 is a deficient number, since it is larger than the sum of its proper divisors (11322704167).

111323212121 is a wasteful number, since it uses less digits than its factorization.

111323212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100201023.

The product of its digits is 144, while the sum is 20.

Adding to 111323212121 its reverse (121212323111), we get a palindrome (232535535232).

The spelling of 111323212121 in words is "one hundred eleven billion, three hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".