31020320221201 has 2 divisors, whose sum is σ = 31020320221202. Its totient is φ = 31020320221200.

The previous prime is 31020320221141. The next prime is 31020320221271. The reversal of 31020320221201 is 10212202302013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29406597156225 + 1613723064976 = 5422785^2 + 1270324^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020320221201 - 2³⁵ = 30985960482833 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020320221271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510160110600 + 15510160110601.

It is an arithmetic number, because the mean of its divisors is an integer number (15510160110601).

Almost surely, 2^{31020320221201} is an apocalyptic number.

It is an amenable number.

31020320221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020320221201 is an equidigital number, since it uses as much as digits as its factorization.

31020320221201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31020320221201 its reverse (10212202302013), we get a palindrome (41232522523214).

The spelling of 31020320221201 in words is "thirty-one trillion, twenty billion, three hundred twenty million, two hundred twenty-one thousand, two hundred one".