11013121 has 4 divisors (see below), whose sum is σ = 12586432. Its totient is φ = 9439812.

The previous prime is 11013097. The next prime is 11013131. The reversal of 11013121 is 12131011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12131011 = 53 ⋅228887.

It is a cyclic number.

It is not a de Polignac number, because 11013121 - 2¹⁷ = 10882049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11013098 and 11013107.

It is not an unprimeable number, because it can be changed into a prime (11013131) 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, 786645 + ... + 786658.

It is an arithmetic number, because the mean of its divisors is an integer number (3146608).

Almost surely, 2^11013121 is an apocalyptic number.

It is an amenable number.

11013121 is a deficient number, since it is larger than the sum of its proper divisors (1573311).

11013121 is an equidigital number, since it uses as much as digits as its factorization.

11013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573310.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 11013121 is about 3318.6022660150. The cubic root of 11013121 is about 222.4864007174.

Adding to 11013121 its reverse (12131011), we get a palindrome (23144132).

It can be divided in two parts, 110 and 13121, that added together give a palindrome (13231).

The spelling of 11013121 in words is "eleven million, thirteen thousand, one hundred twenty-one".