11220231 has 8 divisors (see below), whose sum is σ = 16320384. Its totient is φ = 6800120.

The previous prime is 11220227. The next prime is 11220247. The reversal of 11220231 is 13202211.

11220231 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 11220231 - 2² = 11220227 is a prime.

It is a super-2 number, since 2×11220231² = 251787167386722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220211) 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, 169971 + ... + 170036.

It is an arithmetic number, because the mean of its divisors is an integer number (2040048).

Almost surely, 2^11220231 is an apocalyptic number.

11220231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11220231 is a deficient number, since it is larger than the sum of its proper divisors (5100153).

11220231 is a wasteful number, since it uses less digits than its factorization.

11220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340021.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 11220231 is about 3349.6613261642. The cubic root of 11220231 is about 223.8724228359.

Adding to 11220231 its reverse (13202211), we get a palindrome (24422442).

The spelling of 11220231 in words is "eleven million, two hundred twenty thousand, two hundred thirty-one".