31220230201 has 2 divisors, whose sum is σ = 31220230202. Its totient is φ = 31220230200.

The previous prime is 31220230163. The next prime is 31220230211. The reversal of 31220230201 is 10203202213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16832467600 + 14387762601 = 129740^2 + 119949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31220230201 is a prime.

It is not a weakly prime, because it can be changed into another prime (31220230211) 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, 15610115100 + 15610115101.

It is an arithmetic number, because the mean of its divisors is an integer number (15610115101).

Almost surely, 2^31220230201 is an apocalyptic number.

It is an amenable number.

31220230201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220230201 is an equidigital number, since it uses as much as digits as its factorization.

31220230201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31220230201 its reverse (10203202213), we get a palindrome (41423432414).

The spelling of 31220230201 in words is "thirty-one billion, two hundred twenty million, two hundred thirty thousand, two hundred one".