11021122221021 has 24 divisors (see below), whose sum is σ = 17368052913120. Its totient is φ = 6678915674400.

The previous prime is 11021122220981. The next prime is 11021122221047. The reversal of 11021122221021 is 12012222112011.

11021122221021 is a `hidden beast` number, since 1 + 1 + 0 + 211 + 222 + 210 + 21 = 666.

It is not a de Polignac number, because 11021122221021 - 2⁹ = 11021122220509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11021122220985 and 11021122221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021122221521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3397975 + ... + 5795556.

It is an arithmetic number, because the mean of its divisors is an integer number (723668871380).

Almost surely, 2^{11021122221021} is an apocalyptic number.

11021122221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021122221021 is a deficient number, since it is larger than the sum of its proper divisors (6346930692099).

11021122221021 is a wasteful number, since it uses less digits than its factorization.

11021122221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9205657 (or 9205654 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11021122221021 its reverse (12012222112011), we get a palindrome (23033344333032).

The spelling of 11021122221021 in words is "eleven trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".