11311033171957 has 2 divisors, whose sum is σ = 11311033171958. Its totient is φ = 11311033171956.

The previous prime is 11311033171931. The next prime is 11311033171961. The reversal of 11311033171957 is 75917133011311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8000067176721 + 3310965995236 = 2828439^2 + 1819606^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311033171957 - 2¹⁹ = 11311032647669 is a prime.

It is a super-2 number, since 2×11311033171957² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11311003171957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655516585978 + 5655516585979.

It is an arithmetic number, because the mean of its divisors is an integer number (5655516585979).

Almost surely, 2^{11311033171957} is an apocalyptic number.

It is an amenable number.

11311033171957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311033171957 is an equidigital number, since it uses as much as digits as its factorization.

11311033171957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 43.

The spelling of 11311033171957 in words is "eleven trillion, three hundred eleven billion, thirty-three million, one hundred seventy-one thousand, nine hundred fifty-seven".