11021130421 has 12 divisors (see below), whose sum is σ = 13062397932. Its totient is φ = 9268441728.

The previous prime is 11021130389. The next prime is 11021130427. The reversal of 11021130421 is 12403112011.

It can be written as a sum of positive squares in 2 ways, for example, as 9845600625 + 1175529796 = 99225^2 + 34286^2 .

It is not a de Polignac number, because 11021130421 - 2⁵ = 11021130389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021130395 and 11021130404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021130427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2119300 + ... + 2124493.

It is an arithmetic number, because the mean of its divisors is an integer number (1088533161).

Almost surely, 2^11021130421 is an apocalyptic number.

It is an amenable number.

11021130421 is a deficient number, since it is larger than the sum of its proper divisors (2041267511).

11021130421 is an equidigital number, since it uses as much as digits as its factorization.

11021130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243860 (or 4243853 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11021130421 its reverse (12403112011), we get a palindrome (23424242432).

The spelling of 11021130421 in words is "eleven billion, twenty-one million, one hundred thirty thousand, four hundred twenty-one".