11211321131 has 2 divisors, whose sum is σ = 11211321132. Its totient is φ = 11211321130.

The previous prime is 11211321097. The next prime is 11211321161. The reversal of 11211321131 is 13112311211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211321131 - 2¹⁸ = 11211058987 is a prime.

It is a super-2 number, since 2×11211321131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211321161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605660565 + 5605660566.

It is an arithmetic number, because the mean of its divisors is an integer number (5605660566).

Almost surely, 2^11211321131 is an apocalyptic number.

11211321131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211321131 is an equidigital number, since it uses as much as digits as its factorization.

11211321131 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 11211321131 its reverse (13112311211), we get a palindrome (24323632342).

The spelling of 11211321131 in words is "eleven billion, two hundred eleven million, three hundred twenty-one thousand, one hundred thirty-one".