31220130311947 has 2 divisors, whose sum is σ = 31220130311948. Its totient is φ = 31220130311946.

The previous prime is 31220130311941. The next prime is 31220130312037. The reversal of 31220130311947 is 74911303102213.

It is a weak prime.

It is an emirp because it is prime and its reverse (74911303102213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31220130311947 - 2¹¹ = 31220130309899 is a prime.

It is not a weakly prime, because it can be changed into another prime (31220130311941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610065155973 + 15610065155974.

It is an arithmetic number, because the mean of its divisors is an integer number (15610065155974).

Almost surely, 2^{31220130311947} is an apocalyptic number.

31220130311947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220130311947 is an equidigital number, since it uses as much as digits as its factorization.

31220130311947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 31220130311947 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirty million, three hundred eleven thousand, nine hundred forty-seven".