111220211212111 has 8 divisors (see below), whose sum is σ = 113350647286800. Its totient is φ = 109097953395840.

The previous prime is 111220211212093. The next prime is 111220211212139. The reversal of 111220211212111 is 111212112022111.

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 111220211212111 - 2²⁵ = 111220177657679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220211222111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044537146 + ... + 2044591543.

It is an arithmetic number, because the mean of its divisors is an integer number (14168830910850).

Almost surely, 2^{111220211212111} is an apocalyptic number.

111220211212111 is a deficient number, since it is larger than the sum of its proper divisors (2130436074689).

111220211212111 is an equidigital number, since it uses as much as digits as its factorization.

111220211212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089129209.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111220211212111 its reverse (111212112022111), we get a palindrome (222432323234222).

The spelling of 111220211212111 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred eleven million, two hundred twelve thousand, one hundred eleven".