11131621 has 8 divisors (see below), whose sum is σ = 11761920. Its totient is φ = 10517808.

The previous prime is 11131613. The next prime is 11131639. The reversal of 11131621 is 12613111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11131621 - 2³ = 11131613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131595 and 11131604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2721 + ... + 5446.

It is an arithmetic number, because the mean of its divisors is an integer number (1470240).

Almost surely, 2^11131621 is an apocalyptic number.

It is an amenable number.

11131621 is a deficient number, since it is larger than the sum of its proper divisors (630299).

11131621 is an equidigital number, since it uses as much as digits as its factorization.

11131621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8243.

The product of its digits is 36, while the sum is 16.

The square root of 11131621 is about 3336.4083982630. The cubic root of 11131621 is about 223.2815322546.

Adding to 11131621 its reverse (12613111), we get a palindrome (23744732).

The spelling of 11131621 in words is "eleven million, one hundred thirty-one thousand, six hundred twenty-one".