11120023021 has 4 divisors (see below), whose sum is σ = 11157975612. Its totient is φ = 11082070432.

The previous prime is 11120023009. The next prime is 11120023063. The reversal of 11120023021 is 12032002111.

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 9566796100 + 1553226921 = 97810^2 + 39411^2 .

It is a cyclic number.

It is not a de Polignac number, because 11120023021 - 2⁹ = 11120022509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11120022992 and 11120023010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120023081) 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 3 ways as a sum of consecutive naturals, for example, 18975856 + ... + 18976441.

It is an arithmetic number, because the mean of its divisors is an integer number (2789493903).

Almost surely, 2^11120023021 is an apocalyptic number.

It is an amenable number.

11120023021 is a deficient number, since it is larger than the sum of its proper divisors (37952591).

11120023021 is an equidigital number, since it uses as much as digits as its factorization.

11120023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37952590.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11120023021 its reverse (12032002111), we get a palindrome (23152025132).

The spelling of 11120023021 in words is "eleven billion, one hundred twenty million, twenty-three thousand, twenty-one".