11220331 has 2 divisors, whose sum is σ = 11220332. Its totient is φ = 11220330.

The previous prime is 11220311. The next prime is 11220337. The reversal of 11220331 is 13302211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11220331 - 2⁵ = 11220299 is a prime.

It is a super-2 number, since 2×11220331² = 251791655499122, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (11220337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610165 + 5610166.

It is an arithmetic number, because the mean of its divisors is an integer number (5610166).

Almost surely, 2^11220331 is an apocalyptic number.

11220331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220331 is an equidigital number, since it uses as much as digits as its factorization.

11220331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 11220331 is about 3349.6762530131. The cubic root of 11220331 is about 223.8730879196.

Adding to 11220331 its reverse (13302211), we get a palindrome (24522542).

The spelling of 11220331 in words is "eleven million, two hundred twenty thousand, three hundred thirty-one".