111220221211 has 8 divisors (see below), whose sum is σ = 121376847024. Its totient is φ = 101071211520.

The previous prime is 111220221199. The next prime is 111220221251. The reversal of 111220221211 is 112122022111.

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 111220221211 - 2¹⁹ = 111219696923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220221251) 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, 1873470 + ... + 1931923.

It is an arithmetic number, because the mean of its divisors is an integer number (15172105878).

Almost surely, 2^111220221211 is an apocalyptic number.

111220221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111220221211 is a deficient number, since it is larger than the sum of its proper divisors (10156625813).

111220221211 is a wasteful number, since it uses less digits than its factorization.

111220221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808061.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111220221211 its reverse (112122022111), we get a palindrome (223342243322).

Subtracting 111220221211 from its reverse (112122022111), we obtain a square (901800900 = 30030²).

The spelling of 111220221211 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".