11222121222001 has 4 divisors (see below), whose sum is σ = 11240309425572. Its totient is φ = 11203933018432.

The previous prime is 11222121221959. The next prime is 11222121222097. The reversal of 11222121222001 is 10022212122211.

11222121222001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 936143327025 + 10285977894976 = 967545^2 + 3207176^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222121222001 - 2¹⁵ = 11222121189233 is a prime.

It is a super-3 number, since 3×11222121222001³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11222121222001.

It is not an unprimeable number, because it can be changed into a prime (11222121222601) 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, 9094100860 + ... + 9094102093.

It is an arithmetic number, because the mean of its divisors is an integer number (2810077356393).

Almost surely, 2^{11222121222001} is an apocalyptic number.

It is an amenable number.

11222121222001 is a deficient number, since it is larger than the sum of its proper divisors (18188203571).

11222121222001 is an equidigital number, since it uses as much as digits as its factorization.

11222121222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18188203570.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11222121222001 its reverse (10022212122211), we get a palindrome (21244333344212).

The spelling of 11222121222001 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, one".