31320201001 has 2 divisors, whose sum is σ = 31320201002. Its totient is φ = 31320201000.

The previous prime is 31320200983. The next prime is 31320201037. The reversal of 31320201001 is 10010202313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27192010000 + 4128191001 = 164900^2 + 64251^2 .

It is an emirp because it is prime and its reverse (10010202313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31320201001 - 2¹⁷ = 31320069929 is a prime.

It is not a weakly prime, because it can be changed into another prime (31320201041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660100500 + 15660100501.

It is an arithmetic number, because the mean of its divisors is an integer number (15660100501).

Almost surely, 2^31320201001 is an apocalyptic number.

It is an amenable number.

31320201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320201001 is an equidigital number, since it uses as much as digits as its factorization.

31320201001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31320201001 its reverse (10010202313), we get a palindrome (41330403314).

The spelling of 31320201001 in words is "thirty-one billion, three hundred twenty million, two hundred one thousand, one".