11201131231 has 2 divisors, whose sum is σ = 11201131232. Its totient is φ = 11201131230.

The previous prime is 11201131177. The next prime is 11201131259. The reversal of 11201131231 is 13213110211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11201131231 - 2¹¹ = 11201129183 is a prime.

It is a super-2 number, since 2×11201131231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201138231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600565615 + 5600565616.

It is an arithmetic number, because the mean of its divisors is an integer number (5600565616).

Almost surely, 2^11201131231 is an apocalyptic number.

11201131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201131231 is an equidigital number, since it uses as much as digits as its factorization.

11201131231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11201131231 its reverse (13213110211), we get a palindrome (24414241442).

The spelling of 11201131231 in words is "eleven billion, two hundred one million, one hundred thirty-one thousand, two hundred thirty-one".