11313222011221 has 8 divisors (see below), whose sum is σ = 12304098274104. Its totient is φ = 10339578379200.

The previous prime is 11313222011207. The next prime is 11313222011243. The reversal of 11313222011221 is 12211022231311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1167882230596 + 10145339780625 = 1080686^2 + 3185175^2 .

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 11313222011221 - 2³¹ = 11311074527573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11313222011192 and 11313222011201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11313222011281) 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, 4308156346 + ... + 4308158971.

It is an arithmetic number, because the mean of its divisors is an integer number (1538012284263).

Almost surely, 2^{11313222011221} is an apocalyptic number.

It is an amenable number.

11313222011221 is a deficient number, since it is larger than the sum of its proper divisors (990876262883).

11313222011221 is a wasteful number, since it uses less digits than its factorization.

11313222011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8616315431.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11313222011221 its reverse (12211022231311), we get a palindrome (23524244242532).

The spelling of 11313222011221 in words is "eleven trillion, three hundred thirteen billion, two hundred twenty-two million, eleven thousand, two hundred twenty-one".