11021023221 has 16 divisors (see below), whose sum is σ = 15872036544. Its totient is φ = 6762034944.

The previous prime is 11021023199. The next prime is 11021023253. The reversal of 11021023221 is 12232012011.

It is not a de Polignac number, because 11021023221 - 2⁹ = 11021022709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11021023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021023271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406131 + ... + 432416.

It is an arithmetic number, because the mean of its divisors is an integer number (992002284).

Almost surely, 2^11021023221 is an apocalyptic number.

It is an amenable number.

11021023221 is a deficient number, since it is larger than the sum of its proper divisors (4851013323).

11021023221 is a wasteful number, since it uses less digits than its factorization.

11021023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838900.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11021023221 its reverse (12232012011), we get a palindrome (23253035232).

The spelling of 11021023221 in words is "eleven billion, twenty-one million, twenty-three thousand, two hundred twenty-one".