11201621 has 8 divisors (see below), whose sum is σ = 12304320. Its totient is φ = 10150272.

The previous prime is 11201611. The next prime is 11201653. The reversal of 11201621 is 12610211.

11201621 = 415² + 416² + ... + 471².

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 11201621 - 2¹⁸ = 10939477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201596 and 11201605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12380 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (1538040).

Almost surely, 2^11201621 is an apocalyptic number.

It is an amenable number.

11201621 is a deficient number, since it is larger than the sum of its proper divisors (1102699).

11201621 is a wasteful number, since it uses less digits than its factorization.

11201621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25675.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 11201621 is about 3346.8822805710. The cubic root of 11201621 is about 223.7485819121.

Adding to 11201621 its reverse (12610211), we get a palindrome (23811832).

The spelling of 11201621 in words is "eleven million, two hundred one thousand, six hundred twenty-one".