11211222221001 has 24 divisors (see below), whose sum is σ = 18143632363584. Its totient is φ = 6611040128160.

The previous prime is 11211222220987. The next prime is 11211222221011. The reversal of 11211222221001 is 10012222211211.

11211222221001 is a `hidden beast` number, since 11 + 211 + 222 + 221 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 11211222221001 - 2⁷ = 11211222220873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11211222221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1530329701 + ... + 1530337026.

It is an arithmetic number, because the mean of its divisors is an integer number (755984681816).

Almost surely, 2^{11211222221001} is an apocalyptic number.

11211222221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211222221001 is a deficient number, since it is larger than the sum of its proper divisors (6932410142583).

11211222221001 is a wasteful number, since it uses less digits than its factorization.

11211222221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060666781 (or 3060666778 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11211222221001 its reverse (10012222211211), we get a palindrome (21223444432212).

The spelling of 11211222221001 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, one".