111220212122111 has 8 divisors (see below), whose sum is σ = 111790099653504. Its totient is φ = 110651570247960.

The previous prime is 111220212122101. The next prime is 111220212122113. The reversal of 111220212122111 is 111221212022111.

It is a happy number.

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 111220212122111 - 2²⁶ = 111220145013247 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 (111220212122113) 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, 311235281 + ... + 311592426.

It is an arithmetic number, because the mean of its divisors is an integer number (13973762456688).

Almost surely, 2^{111220212122111} is an apocalyptic number.

111220212122111 is a deficient number, since it is larger than the sum of its proper divisors (569887531393).

111220212122111 is an equidigital number, since it uses as much as digits as its factorization.

111220212122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622828621.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111220212122111 its reverse (111221212022111), we get a palindrome (222441424144222).

The spelling of 111220212122111 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twelve million, one hundred twenty-two thousand, one hundred eleven".