11122010211221 has 60 divisors (see below), whose sum is σ = 14059288500228. Its totient is φ = 8793859156992.

The previous prime is 11122010211197. The next prime is 11122010211281. The reversal of 11122010211221 is 12211201022111.

It can be written as a sum of positive squares in 6 ways, for example, as 2834808648721 + 8287201562500 = 1683689^2 + 2878750^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11122010211221 is a prime.

It is a super-2 number, since 2×11122010211221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11122010211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122010211281) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 654496901 + ... + 654513893.

Almost surely, 2^{11122010211221} is an apocalyptic number.

It is an amenable number.

11122010211221 is a deficient number, since it is larger than the sum of its proper divisors (2937278289007).

11122010211221 is an equidigital number, since it uses as much as digits as its factorization.

11122010211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18660 (or 18626 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11122010211221 its reverse (12211201022111), we get a palindrome (23333211233332).

The spelling of 11122010211221 in words is "eleven trillion, one hundred twenty-two billion, ten million, two hundred eleven thousand, two hundred twenty-one".