11012202221221 has 4 divisors (see below), whose sum is σ = 11069260264012. Its totient is φ = 10955144178432.

The previous prime is 11012202221213. The next prime is 11012202221263. The reversal of 11012202221221 is 12212220221011.

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 4589834912100 + 6422367309121 = 2142390^2 + 2534239^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012202221221 - 2³ = 11012202221213 is a prime.

It is a super-2 number, since 2×11012202221221² (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 (11012202221521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28529021106 + ... + 28529021491.

It is an arithmetic number, because the mean of its divisors is an integer number (2767315066003).

Almost surely, 2^{11012202221221} is an apocalyptic number.

It is an amenable number.

11012202221221 is a deficient number, since it is larger than the sum of its proper divisors (57058042791).

11012202221221 is an equidigital number, since it uses as much as digits as its factorization.

11012202221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57058042790.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11012202221221 its reverse (12212220221011), we get a palindrome (23224422442232).

The spelling of 11012202221221 in words is "eleven trillion, twelve billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".