11221213001 has 4 divisors (see below), whose sum is σ = 11881284372. Its totient is φ = 10561141632.

The previous prime is 11221212913. The next prime is 11221213037. The reversal of 11221213001 is 10031212211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9182238976 + 2038974025 = 95824^2 + 45155^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221213001 - 2¹⁴ = 11221196617 is a prime.

It is a super-2 number, since 2×11221213001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221213061) 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, 330035660 + ... + 330035693.

It is an arithmetic number, because the mean of its divisors is an integer number (2970321093).

Almost surely, 2^11221213001 is an apocalyptic number.

It is an amenable number.

11221213001 is a deficient number, since it is larger than the sum of its proper divisors (660071371).

11221213001 is an equidigital number, since it uses as much as digits as its factorization.

11221213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660071370.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11221213001 its reverse (10031212211), we get a palindrome (21252425212).

The spelling of 11221213001 in words is "eleven billion, two hundred twenty-one million, two hundred thirteen thousand, one".