11021221023 has 16 divisors (see below), whose sum is σ = 15586661376. Its totient is φ = 6903146880.

The previous prime is 11021221021. The next prime is 11021221027. The reversal of 11021221023 is 32012212011.

It is not a de Polignac number, because 11021221023 - 2¹ = 11021221021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11021220993 and 11021221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021221021) 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 15 ways as a sum of consecutive naturals, for example, 160111 + ... + 218352.

It is an arithmetic number, because the mean of its divisors is an integer number (974166336).

Almost surely, 2^11021221023 is an apocalyptic number.

11021221023 is a deficient number, since it is larger than the sum of its proper divisors (4565440353).

11021221023 is a wasteful number, since it uses less digits than its factorization.

11021221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379054.

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

Adding to 11021221023 its reverse (32012212011), we get a palindrome (43033433034).

The spelling of 11021221023 in words is "eleven billion, twenty-one million, two hundred twenty-one thousand, twenty-three".