11123312002531 has 2 divisors, whose sum is σ = 11123312002532. Its totient is φ = 11123312002530.

The previous prime is 11123312002483. The next prime is 11123312002553. The reversal of 11123312002531 is 13520021332111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11123312002531 - 2²³ = 11123303613923 is a prime.

It is a super-2 number, since 2×11123312002531² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11123312002496 and 11123312002505.

It is not a weakly prime, because it can be changed into another prime (11123312006531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561656001265 + 5561656001266.

It is an arithmetic number, because the mean of its divisors is an integer number (5561656001266).

Almost surely, 2^{11123312002531} is an apocalyptic number.

11123312002531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123312002531 is an equidigital number, since it uses as much as digits as its factorization.

11123312002531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 11123312002531 its reverse (13520021332111), we get a palindrome (24643333334642).

The spelling of 11123312002531 in words is "eleven trillion, one hundred twenty-three billion, three hundred twelve million, two thousand, five hundred thirty-one".