11123211131 has 2 divisors, whose sum is σ = 11123211132. Its totient is φ = 11123211130.

The previous prime is 11123211101. The next prime is 11123211133. The reversal of 11123211131 is 13111232111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11123211131 - 2¹⁸ = 11122948987 is a prime.

It is a super-2 number, since 2×11123211131² (a number of 21 digits) contains 22 as substring.

Together with 11123211133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11123211133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561605565 + 5561605566.

It is an arithmetic number, because the mean of its divisors is an integer number (5561605566).

Almost surely, 2^11123211131 is an apocalyptic number.

11123211131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123211131 is an equidigital number, since it uses as much as digits as its factorization.

11123211131 is an evil number, because the sum of its binary digits is even.

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

Adding to 11123211131 its reverse (13111232111), we get a palindrome (24234443242).

The spelling of 11123211131 in words is "eleven billion, one hundred twenty-three million, two hundred eleven thousand, one hundred thirty-one".