11200421 has 4 divisors (see below), whose sum is σ = 11473644. Its totient is φ = 10927200.

The previous prime is 11200403. The next prime is 11200451. The reversal of 11200421 is 12400211.

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 1677025 + 9523396 = 1295^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200421 - 2¹⁴ = 11184037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200451) 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, 136550 + ... + 136631.

It is an arithmetic number, because the mean of its divisors is an integer number (2868411).

Almost surely, 2^11200421 is an apocalyptic number.

It is an amenable number.

11200421 is a deficient number, since it is larger than the sum of its proper divisors (273223).

11200421 is an equidigital number, since it uses as much as digits as its factorization.

11200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273222.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 11200421 is about 3346.7030044508. The cubic root of 11200421 is about 223.7405917624.

Adding to 11200421 its reverse (12400211), we get a palindrome (23600632).

The spelling of 11200421 in words is "eleven million, two hundred thousand, four hundred twenty-one".