11201012331221 has 4 divisors (see below), whose sum is σ = 11201171081100. Its totient is φ = 11200853581344.

The previous prime is 11201012331199. The next prime is 11201012331227. The reversal of 11201012331221 is 12213321010211.

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 5394772702225 + 5806239628996 = 2322665^2 + 2409614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201012331221 - 2³⁰ = 11199938589397 is a prime.

It is a super-2 number, since 2×11201012331221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201012331193 and 11201012331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201012331227) 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, 79269056 + ... + 79410233.

It is an arithmetic number, because the mean of its divisors is an integer number (2800292770275).

Almost surely, 2^{11201012331221} is an apocalyptic number.

It is an amenable number.

11201012331221 is a deficient number, since it is larger than the sum of its proper divisors (158749879).

11201012331221 is an equidigital number, since it uses as much as digits as its factorization.

11201012331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158749878.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11201012331221 its reverse (12213321010211), we get a palindrome (23414333341432).

The spelling of 11201012331221 in words is "eleven trillion, two hundred one billion, twelve million, three hundred thirty-one thousand, two hundred twenty-one".