11211331 has 2 divisors, whose sum is σ = 11211332. Its totient is φ = 11211330.

The previous prime is 11211293. The next prime is 11211341. The reversal of 11211331 is 13311211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211331 - 2⁷ = 11211203 is a prime.

It is a super-2 number, since 2×11211331² = 251387885583122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605665 + 5605666.

It is an arithmetic number, because the mean of its divisors is an integer number (5605666).

Almost surely, 2^11211331 is an apocalyptic number.

11211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211331 is an equidigital number, since it uses as much as digits as its factorization.

11211331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 13.

The square root of 11211331 is about 3348.3325701011. The cubic root of 11211331 is about 223.8132145597.

Adding to 11211331 its reverse (13311211), we get a palindrome (24522542).

The spelling of 11211331 in words is "eleven million, two hundred eleven thousand, three hundred thirty-one".