31211130189443 has 2 divisors, whose sum is σ = 31211130189444. Its totient is φ = 31211130189442.

The previous prime is 31211130189439. The next prime is 31211130189451. The reversal of 31211130189443 is 34498103111213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31211130189443 - 2² = 31211130189439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31211130189443.

It is not a weakly prime, because it can be changed into another prime (31211130189403) 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, 15605565094721 + 15605565094722.

It is an arithmetic number, because the mean of its divisors is an integer number (15605565094722).

Almost surely, 2^{31211130189443} is an apocalyptic number.

31211130189443 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211130189443 is an equidigital number, since it uses as much as digits as its factorization.

31211130189443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 31211130189443 in words is "thirty-one trillion, two hundred eleven billion, one hundred thirty million, one hundred eighty-nine thousand, four hundred forty-three".