31884920201 has 2 divisors, whose sum is σ = 31884920202. Its totient is φ = 31884920200.

The previous prime is 31884920173. The next prime is 31884920269. The reversal of 31884920201 is 10202948813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30590359801 + 1294560400 = 174901^2 + 35980^2 .

It is an emirp because it is prime and its reverse (10202948813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31884920201 - 2²² = 31880725897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31884923201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15942460100 + 15942460101.

It is an arithmetic number, because the mean of its divisors is an integer number (15942460101).

Almost surely, 2^31884920201 is an apocalyptic number.

It is an amenable number.

31884920201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31884920201 is an equidigital number, since it uses as much as digits as its factorization.

31884920201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 31884920201 in words is "thirty-one billion, eight hundred eighty-four million, nine hundred twenty thousand, two hundred one".