111212212013 has 8 divisors (see below), whose sum is σ = 127176112128. Its totient is φ = 95267422224.

The previous prime is 111212211997. The next prime is 111212212021. The reversal of 111212212013 is 310212212111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111212212013 - 2⁴ = 111212211997 is a prime.

It is a super-2 number, since 2×111212212013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111212211982 and 111212212000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212212513) 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, 4765106 + ... + 4788387.

It is an arithmetic number, because the mean of its divisors is an integer number (15897014016).

Almost surely, 2^111212212013 is an apocalyptic number.

It is an amenable number.

111212212013 is a deficient number, since it is larger than the sum of its proper divisors (15963900115).

111212212013 is an equidigital number, since it uses as much as digits as its factorization.

111212212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9555163.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111212212013 its reverse (310212212111), we get a palindrome (421424424124).

The spelling of 111212212013 in words is "one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, thirteen".