11121002001 has 40 divisors (see below), whose sum is σ = 16874028864. Its totient is φ = 7297788960.

The previous prime is 11121001987. The next prime is 11121002017. The reversal of 11121002001 is 10020012111.

It is a happy number.

It is not a de Polignac number, because 11121002001 - 2²² = 11116807697 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 (11121002071) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4904470 + ... + 4906736.

Almost surely, 2^11121002001 is an apocalyptic number.

It is an amenable number.

11121002001 is a deficient number, since it is larger than the sum of its proper divisors (5753026863).

11121002001 is an equidigital number, since it uses as much as digits as its factorization.

11121002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3194 counting only the distinct ones).

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

Adding to 11121002001 its reverse (10020012111), we get a palindrome (21141014112).

The spelling of 11121002001 in words is "eleven billion, one hundred twenty-one million, two thousand, one".