11222111221021 has 8 divisors (see below), whose sum is σ = 11892228881400. Its totient is φ = 10570870114560.

The previous prime is 11222111221019. The next prime is 11222111221031. The reversal of 11222111221021 is 12012211122211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 333523575225 + 10888587645796 = 577515^2 + 3299786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11222111221021 - 2¹ = 11222111221019 is a prime.

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 11222111221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222111221031) 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, 4719137256 + ... + 4719139633.

It is an arithmetic number, because the mean of its divisors is an integer number (1486528610175).

Almost surely, 2^{11222111221021} is an apocalyptic number.

It is an amenable number.

11222111221021 is a deficient number, since it is larger than the sum of its proper divisors (670117660379).

11222111221021 is an equidigital number, since it uses as much as digits as its factorization.

11222111221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9438276959.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11222111221021 its reverse (12012211122211), we get a palindrome (23234322343232).

The spelling of 11222111221021 in words is "eleven trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".