11211211331 has 2 divisors, whose sum is σ = 11211211332. Its totient is φ = 11211211330.

The previous prime is 11211211303. The next prime is 11211211343. The reversal of 11211211331 is 13311211211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211211331 - 2¹⁴ = 11211194947 is a prime.

It is a super-2 number, since 2×11211211331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211211351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605605665 + 5605605666.

It is an arithmetic number, because the mean of its divisors is an integer number (5605605666).

Almost surely, 2^11211211331 is an apocalyptic number.

11211211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211211331 is an equidigital number, since it uses as much as digits as its factorization.

11211211331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 17.

Adding to 11211211331 its reverse (13311211211), we get a palindrome (24522422542).

The spelling of 11211211331 in words is "eleven billion, two hundred eleven million, two hundred eleven thousand, three hundred thirty-one".