11201231 has 4 divisors (see below), whose sum is σ = 11266152. Its totient is φ = 11136312.

The previous prime is 11201219. The next prime is 11201233. The reversal of 11201231 is 13210211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201231 is a prime.

It is a super-2 number, since 2×11201231² = 250935151830722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201233) 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, 32201 + ... + 32546.

It is an arithmetic number, because the mean of its divisors is an integer number (2816538).

Almost surely, 2^11201231 is an apocalyptic number.

11201231 is a deficient number, since it is larger than the sum of its proper divisors (64921).

11201231 is an equidigital number, since it uses as much as digits as its factorization.

11201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64920.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11201231 is about 3346.8240168853. The cubic root of 11201231 is about 223.7459851760.

Adding to 11201231 its reverse (13210211), we get a palindrome (24411442).

The spelling of 11201231 in words is "eleven million, two hundred one thousand, two hundred thirty-one".