31302020201 has 2 divisors, whose sum is σ = 31302020202. Its totient is φ = 31302020200.

The previous prime is 31302020161. The next prime is 31302020251. The reversal of 31302020201 is 10202020313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28325226601 + 2976793600 = 168301^2 + 54560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31302020201 is a prime.

It is not a weakly prime, because it can be changed into another prime (31302020251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651010100 + 15651010101.

It is an arithmetic number, because the mean of its divisors is an integer number (15651010101).

Almost surely, 2^31302020201 is an apocalyptic number.

It is an amenable number.

31302020201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31302020201 is an equidigital number, since it uses as much as digits as its factorization.

31302020201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31302020201 its reverse (10202020313), we get a palindrome (41504040514).

The spelling of 31302020201 in words is "thirty-one billion, three hundred two million, twenty thousand, two hundred one".