1111221120211 has 4 divisors (see below), whose sum is σ = 1113070074424. Its totient is φ = 1109372166000.

The previous prime is 1111221120193. The next prime is 1111221120221. The reversal of 1111221120211 is 1120211221111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1111221120211 - 2¹³ = 1111221112019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111221120221) 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, 924476205 + ... + 924477406.

It is an arithmetic number, because the mean of its divisors is an integer number (278267518606).

Almost surely, 2^{1111221120211} is an apocalyptic number.

1111221120211 is a deficient number, since it is larger than the sum of its proper divisors (1848954213).

1111221120211 is an equidigital number, since it uses as much as digits as its factorization.

1111221120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848954212.

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

Adding to 1111221120211 its reverse (1120211221111), we get a palindrome (2231432341322).

The spelling of 1111221120211 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred eleven".