31111202123069 has 2 divisors, whose sum is σ = 31111202123070. Its totient is φ = 31111202123068.

The previous prime is 31111202123009. The next prime is 31111202123081. The reversal of 31111202123069 is 96032120211113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23719529872900 + 7391672250169 = 4870270^2 + 2718763^2 .

It is an emirp because it is prime and its reverse (96032120211113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31111202123069 - 2⁸ = 31111202122813 is a prime.

It is a super-2 number, since 2×31111202123069² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111202123009) 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, 15555601061534 + 15555601061535.

It is an arithmetic number, because the mean of its divisors is an integer number (15555601061535).

Almost surely, 2^{31111202123069} is an apocalyptic number.

It is an amenable number.

31111202123069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111202123069 is an equidigital number, since it uses as much as digits as its factorization.

31111202123069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 31111202123069 in words is "thirty-one trillion, one hundred eleven billion, two hundred two million, one hundred twenty-three thousand, sixty-nine".