11121001 has 4 divisors (see below), whose sum is σ = 11189392. Its totient is φ = 11052612.

The previous prime is 11120981. The next prime is 11121037. The reversal of 11121001 is 10012111.

11121001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 11121001 - 2¹³ = 11112809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121041) 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, 33951 + ... + 34276.

It is an arithmetic number, because the mean of its divisors is an integer number (2797348).

Almost surely, 2^11121001 is an apocalyptic number.

It is an amenable number.

11121001 is a deficient number, since it is larger than the sum of its proper divisors (68391).

11121001 is an equidigital number, since it uses as much as digits as its factorization.

11121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68390.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 11121001 is about 3334.8164867051. The cubic root of 11121001 is about 223.2105032356.

Adding to 11121001 its reverse (10012111), we get a palindrome (21133112).

Multiplying 11121001 by its reverse (10012111), we get a palindrome (111344696443111).

It can be divided in two parts, 111 and 21001, that added together give a palindrome (21112).

The spelling of 11121001 in words is "eleven million, one hundred twenty-one thousand, one".