11122001001 has 32 divisors (see below), whose sum is σ = 17579548800. Its totient is φ = 6925201920.

The previous prime is 11122000999. The next prime is 11122001021. The reversal of 11122001001 is 10010022111.

It is a happy number.

It is not a de Polignac number, because 11122001001 - 2¹ = 11122000999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11122001021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32356 + ... + 152613.

It is an arithmetic number, because the mean of its divisors is an integer number (549360900).

Almost surely, 2^11122001001 is an apocalyptic number.

It is an amenable number.

11122001001 is a deficient number, since it is larger than the sum of its proper divisors (6457547799).

11122001001 is a wasteful number, since it uses less digits than its factorization.

11122001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185126 (or 185120 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11122001001 its reverse (10010022111), we get a palindrome (21132023112).

The spelling of 11122001001 in words is "eleven billion, one hundred twenty-two million, one thousand, one".