11121 has 8 divisors (see below), whose sum is σ = 16224. Its totient is φ = 6720.

The previous prime is 11119. The next prime is 11131. The reversal of 11121 is 12111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11121 - 2¹ = 11119 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11131) 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, 136 + ... + 201.

It is an arithmetic number, because the mean of its divisors is an integer number (2028).

2¹¹¹²¹ is an apocalyptic number.

11121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121 is a deficient number, since it is larger than the sum of its proper divisors (5103).

11121 is a wasteful number, since it uses less digits than its factorization.

11121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 2, while the sum is 6.

The square root of 11121 is about 105.4561520254. The cubic root of 11121 is about 22.3210496545.

Adding to 11121 its reverse (12111), we get a palindrome (23232).

Subtracting 11121 from its reverse (12111), we obtain a triangular number (990 = T₄₄).

Multiplying 11121 by its reverse (12111), we get a palindrome (134686431).

It can be divided in two parts, 11 and 121, that multiplied together give a palindrome (1331).

The spelling of 11121 in words is "eleven thousand, one hundred twenty-one", and thus it is an iban number.