11202221021221 has 8 divisors (see below), whose sum is σ = 11385926604504. Its totient is φ = 11018517457920.

The previous prime is 11202221021213. The next prime is 11202221021267. The reversal of 11202221021221 is 12212012220211.

It can be written as a sum of positive squares in 4 ways, for example, as 1314780996321 + 9887440024900 = 1146639^2 + 3144430^2 .

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 11202221021221 - 2³ = 11202221021213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202221021021) 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, 14123241 + ... + 14895313.

It is an arithmetic number, because the mean of its divisors is an integer number (1423240825563).

Almost surely, 2^{11202221021221} is an apocalyptic number.

It is an amenable number.

11202221021221 is a deficient number, since it is larger than the sum of its proper divisors (183705583283).

11202221021221 is an equidigital number, since it uses as much as digits as its factorization.

11202221021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009991.

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

Adding to 11202221021221 its reverse (12212012220211), we get a palindrome (23414233241432).

The spelling of 11202221021221 in words is "eleven trillion, two hundred two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".