111212222001 has 8 divisors (see below), whose sum is σ = 148600486944. Its totient is φ = 73982719200.

The previous prime is 111212221997. The next prime is 111212222053. The reversal of 111212222001 is 100222212111.

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

It is not a de Polignac number, because 111212222001 - 2² = 111212221997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111212222201) 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 7 ways as a sum of consecutive naturals, for example, 39688900 + ... + 39691701.

It is an arithmetic number, because the mean of its divisors is an integer number (18575060868).

Almost surely, 2^111212222001 is an apocalyptic number.

It is an amenable number.

111212222001 is a deficient number, since it is larger than the sum of its proper divisors (37388264943).

111212222001 is an equidigital number, since it uses as much as digits as its factorization.

111212222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79381071.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111212222001 its reverse (100222212111), we get a palindrome (211434434112).

The spelling of 111212222001 in words is "one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, one".