311233123133 has 2 divisors, whose sum is σ = 311233123134. Its totient is φ = 311233123132.

The previous prime is 311233123063. The next prime is 311233123189. The reversal of 311233123133 is 331321332113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290086728409 + 21146394724 = 538597^2 + 145418^2 .

It is an emirp because it is prime and its reverse (331321332113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311233123133 - 2¹⁴ = 311233106749 is a prime.

It is a super-2 number, since 2×311233123133² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311233183133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155616561566 + 155616561567.

It is an arithmetic number, because the mean of its divisors is an integer number (155616561567).

Almost surely, 2^311233123133 is an apocalyptic number.

It is an amenable number.

311233123133 is a deficient number, since it is larger than the sum of its proper divisors (1).

311233123133 is an equidigital number, since it uses as much as digits as its factorization.

311233123133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 26.

Adding to 311233123133 its reverse (331321332113), we get a palindrome (642554455246).

The spelling of 311233123133 in words is "three hundred eleven billion, two hundred thirty-three million, one hundred twenty-three thousand, one hundred thirty-three".