111212011219 has 4 divisors (see below), whose sum is σ = 111625439040. Its totient is φ = 110798583400.

The previous prime is 111212011217. The next prime is 111212011241. The reversal of 111212011219 is 912110212111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111212011219 - 2¹ = 111212011217 is a prime.

It is a super-2 number, since 2×111212011219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111212011219.

It is not an unprimeable number, because it can be changed into a prime (111212011217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206713507 + ... + 206714044.

It is an arithmetic number, because the mean of its divisors is an integer number (27906359760).

Almost surely, 2^111212011219 is an apocalyptic number.

111212011219 is a deficient number, since it is larger than the sum of its proper divisors (413427821).

111212011219 is an equidigital number, since it uses as much as digits as its factorization.

111212011219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413427820.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 111212011219 in words is "one hundred eleven billion, two hundred twelve million, eleven thousand, two hundred nineteen".