111002211212111 has 4 divisors (see below), whose sum is σ = 111002243007432. Its totient is φ = 111002179416792.

The previous prime is 111002211212107. The next prime is 111002211212129. The reversal of 111002211212111 is 111212112200111.

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 111002211212111 - 2² = 111002211212107 is a prime.

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 111002211212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002211212911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9908945 + ... + 17893898.

It is an arithmetic number, because the mean of its divisors is an integer number (27750560751858).

Almost surely, 2^{111002211212111} is an apocalyptic number.

111002211212111 is a deficient number, since it is larger than the sum of its proper divisors (31795321).

111002211212111 is an equidigital number, since it uses as much as digits as its factorization.

111002211212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31795320.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111002211212111 its reverse (111212112200111), we get a palindrome (222214323412222).

The spelling of 111002211212111 in words is "one hundred eleven trillion, two billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".