11130401221 has 4 divisors (see below), whose sum is σ = 11131176492. Its totient is φ = 11129625952.

The previous prime is 11130401189. The next prime is 11130401273. The reversal of 11130401221 is 12210403111.

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 4946308900 + 6184092321 = 70330^2 + 78639^2 .

It is a cyclic number.

It is not a de Polignac number, because 11130401221 - 2⁵ = 11130401189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11130401195 and 11130401204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11130401281) 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, 365686 + ... + 394951.

It is an arithmetic number, because the mean of its divisors is an integer number (2782794123).

Almost surely, 2^11130401221 is an apocalyptic number.

It is an amenable number.

11130401221 is a deficient number, since it is larger than the sum of its proper divisors (775271).

11130401221 is an equidigital number, since it uses as much as digits as its factorization.

11130401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775270.

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

Adding to 11130401221 its reverse (12210403111), we get a palindrome (23340804332).

The spelling of 11130401221 in words is "eleven billion, one hundred thirty million, four hundred one thousand, two hundred twenty-one".