222011121 has 4 divisors (see below), whose sum is σ = 296014832. Its totient is φ = 148007412.

The previous prime is 222011089. The next prime is 222011129. The reversal of 222011121 is 121110222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222011121 - 2⁵ = 222011089 is a prime.

It is a super-3 number, since 3×222011121³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222011097 and 222011106.

It is not an unprimeable number, because it can be changed into a prime (222011129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37001851 + ... + 37001856.

It is an arithmetic number, because the mean of its divisors is an integer number (74003708).

Almost surely, 2^222011121 is an apocalyptic number.

It is an amenable number.

222011121 is a deficient number, since it is larger than the sum of its proper divisors (74003711).

222011121 is an equidigital number, since it uses as much as digits as its factorization.

222011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74003710.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 222011121 is about 14900.0376174022. The cubic root of 222011121 is about 605.5150053230.

Adding to 222011121 its reverse (121110222), we get a palindrome (343121343).

The spelling of 222011121 in words is "two hundred twenty-two million, eleven thousand, one hundred twenty-one".