11221010001 has 8 divisors (see below), whose sum is σ = 16623718560. Its totient is φ = 7480673316.

The previous prime is 11221009997. The next prime is 11221010027. The reversal of 11221010001 is 10001012211.

It is a happy number.

It is not a de Polignac number, because 11221010001 - 2² = 11221009997 is a prime.

It is a super-2 number, since 2×11221010001² (a number of 21 digits) contains 22 as substring.

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 (11221010051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207796455 + ... + 207796508.

It is an arithmetic number, because the mean of its divisors is an integer number (2077964820).

Almost surely, 2^11221010001 is an apocalyptic number.

It is an amenable number.

11221010001 is a deficient number, since it is larger than the sum of its proper divisors (5402708559).

11221010001 is an equidigital number, since it uses as much as digits as its factorization.

11221010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415592972 (or 415592966 counting only the distinct ones).

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

Adding to 11221010001 its reverse (10001012211), we get a palindrome (21222022212).

The spelling of 11221010001 in words is "eleven billion, two hundred twenty-one million, ten thousand, one".