11010021122221 has 18 divisors (see below), whose sum is σ = 12222932790698. Its totient is φ = 9910008900000.

The previous prime is 11010021122197. The next prime is 11010021122251. The reversal of 11010021122221 is 12222112001011.

It can be written as a sum of positive squares in 3 ways, for example, as 9017942934121 + 1992078188100 = 3002989^2 + 1411410^2 .

It is not a de Polignac number, because 11010021122221 - 2²¹ = 11010019025069 is a prime.

It is a super-2 number, since 2×11010021122221² (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 = 11010021122195 and 11010021122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010021122251) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3225630 + ... + 5694271.

Almost surely, 2^{11010021122221} is an apocalyptic number.

11010021122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11010021122221 is a deficient number, since it is larger than the sum of its proper divisors (1212911668477).

11010021122221 is an equidigital number, since it uses as much as digits as its factorization.

11010021122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8920125 (or 8920013 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11010021122221 its reverse (12222112001011), we get a palindrome (23232133123232).

The spelling of 11010021122221 in words is "eleven trillion, ten billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".