221011323021 has 48 divisors (see below), whose sum is σ = 327653921088. Its totient is φ = 143510400000.

The previous prime is 221011323019. The next prime is 221011323041. The reversal of 221011323021 is 120323110122.

221011323021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221011323021 - 2¹ = 221011323019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221011322985 and 221011323003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011323041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55237021 + ... + 55241021.

It is an arithmetic number, because the mean of its divisors is an integer number (6826123356).

Almost surely, 2^221011323021 is an apocalyptic number.

It is an amenable number.

221011323021 is a deficient number, since it is larger than the sum of its proper divisors (106642598067).

221011323021 is a wasteful number, since it uses less digits than its factorization.

221011323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082 (or 5079 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221011323021 its reverse (120323110122), we get a palindrome (341334433143).

The spelling of 221011323021 in words is "two hundred twenty-one billion, eleven million, three hundred twenty-three thousand, twenty-one".