111212112211001 has 8 divisors (see below), whose sum is σ = 116163973922880. Its totient is φ = 106334714585232.

The previous prime is 111212112210989. The next prime is 111212112211007. The reversal of 111212112211001 is 100112211212111.

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 111212112211001 - 2¹⁸ = 111212111948857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212112211007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18616018475 + ... + 18616024448.

It is an arithmetic number, because the mean of its divisors is an integer number (14520496740360).

Almost surely, 2^{111212112211001} is an apocalyptic number.

It is an amenable number.

111212112211001 is a deficient number, since it is larger than the sum of its proper divisors (4951861711879).

111212112211001 is a wasteful number, since it uses less digits than its factorization.

111212112211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37232043055.

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

Adding to 111212112211001 its reverse (100112211212111), we get a palindrome (211324323423112).

The spelling of 111212112211001 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twelve million, two hundred eleven thousand, one".