11231112157 has 2 divisors, whose sum is σ = 11231112158. Its totient is φ = 11231112156.

The previous prime is 11231112133. The next prime is 11231112241. The reversal of 11231112157 is 75121113211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9102304836 + 2128807321 = 95406^2 + 46139^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231112157 - 2¹¹ = 11231110109 is a prime.

It is a super-2 number, since 2×11231112157² (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 (11231112457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615556078 + 5615556079.

It is an arithmetic number, because the mean of its divisors is an integer number (5615556079).

Almost surely, 2^11231112157 is an apocalyptic number.

It is an amenable number.

11231112157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231112157 is an equidigital number, since it uses as much as digits as its factorization.

11231112157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 25.

Adding to 11231112157 its reverse (75121113211), we get a palindrome (86352225368).

The spelling of 11231112157 in words is "eleven billion, two hundred thirty-one million, one hundred twelve thousand, one hundred fifty-seven".