11321031157 has 2 divisors, whose sum is σ = 11321031158. Its totient is φ = 11321031156.

The previous prime is 11321031131. The next prime is 11321031167. The reversal of 11321031157 is 75113012311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11319683236 + 1347921 = 106394^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321031157 - 2¹⁵ = 11320998389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321031167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660515578 + 5660515579.

It is an arithmetic number, because the mean of its divisors is an integer number (5660515579).

Almost surely, 2^11321031157 is an apocalyptic number.

It is an amenable number.

11321031157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321031157 is an equidigital number, since it uses as much as digits as its factorization.

11321031157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 25.

Adding to 11321031157 its reverse (75113012311), we get a palindrome (86434043468).

The spelling of 11321031157 in words is "eleven billion, three hundred twenty-one million, thirty-one thousand, one hundred fifty-seven".