11120120021 has 4 divisors (see below), whose sum is σ = 11167846092. Its totient is φ = 11072393952.

The previous prime is 11120120009. The next prime is 11120120059. The reversal of 11120120021 is 12002102111.

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 1022080900 + 10098039121 = 31970^2 + 100489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11120120021 - 2¹⁴ = 11120103637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11120119984 and 11120120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120120071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23862686 + ... + 23863151.

It is an arithmetic number, because the mean of its divisors is an integer number (2791961523).

Almost surely, 2^11120120021 is an apocalyptic number.

It is an amenable number.

11120120021 is a deficient number, since it is larger than the sum of its proper divisors (47726071).

11120120021 is an equidigital number, since it uses as much as digits as its factorization.

11120120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47726070.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11120120021 its reverse (12002102111), we get a palindrome (23122222132).

The spelling of 11120120021 in words is "eleven billion, one hundred twenty million, one hundred twenty thousand, twenty-one".