11122001 has 4 divisors (see below), whose sum is σ = 12133104. Its totient is φ = 10110900.

The previous prime is 11121989. The next prime is 11122003. The reversal of 11122001 is 10022111.

11122001 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, and also an emirpimes, since its reverse is a distinct semiprime: 10022111 = 11 ⋅911101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11122001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11122001.

It is not an unprimeable number, because it can be changed into a prime (11122003) 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, 505535 + ... + 505556.

It is an arithmetic number, because the mean of its divisors is an integer number (3033276).

Almost surely, 2^11122001 is an apocalyptic number.

11122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11122001 is a deficient number, since it is larger than the sum of its proper divisors (1011103).

11122001 is a wasteful number, since it uses less digits than its factorization.

11122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011102.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11122001 is about 3334.9664166225. The cubic root of 11122001 is about 223.2171933951.

Adding to 11122001 its reverse (10022111), we get a palindrome (21144112).

It can be divided in two parts, 1112 and 2001, that added together give a palindrome (3113).

The spelling of 11122001 in words is "eleven million, one hundred twenty-two thousand, one".