111212122219 has 4 divisors (see below), whose sum is σ = 121322315160. Its totient is φ = 101101929280.

The previous prime is 111212122199. The next prime is 111212122247. The reversal of 111212122219 is 912221212111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912221212111 = 11 ⋅82929201101.

It is not a de Polignac number, because 111212122219 - 2⁵ = 111212122187 is a prime.

It is a super-2 number, since 2×111212122219² (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 = 111212122193 and 111212122202.

It is not an unprimeable number, because it can be changed into a prime (111212122919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055096454 + ... + 5055096475.

It is an arithmetic number, because the mean of its divisors is an integer number (30330578790).

Almost surely, 2^111212122219 is an apocalyptic number.

111212122219 is a deficient number, since it is larger than the sum of its proper divisors (10110192941).

111212122219 is a wasteful number, since it uses less digits than its factorization.

111212122219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110192940.

The product of its digits is 288, while the sum is 25.

The spelling of 111212122219 in words is "one hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred nineteen".