11010210011221 has 4 divisors (see below), whose sum is σ = 11037666894444. Its totient is φ = 10982753128000.

The previous prime is 11010210011201. The next prime is 11010210011233. The reversal of 11010210011221 is 12211001201011.

It is a happy number.

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 9098433682321 + 1911776328900 = 3016361^2 + 1382670^2 .

It is a cyclic number.

It is not a de Polignac number, because 11010210011221 - 2¹³ = 11010210003029 is a prime.

It is a super-2 number, since 2×11010210011221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010210011201) 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, 13728441010 + ... + 13728441811.

It is an arithmetic number, because the mean of its divisors is an integer number (2759416723611).

Almost surely, 2^{11010210011221} is an apocalyptic number.

It is an amenable number.

11010210011221 is a deficient number, since it is larger than the sum of its proper divisors (27456883223).

11010210011221 is an equidigital number, since it uses as much as digits as its factorization.

11010210011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27456883222.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11010210011221 its reverse (12211001201011), we get a palindrome (23221211212232).

The spelling of 11010210011221 in words is "eleven trillion, ten billion, two hundred ten million, eleven thousand, two hundred twenty-one".