31020221210113 has 2 divisors, whose sum is σ = 31020221210114. Its totient is φ = 31020221210112.

The previous prime is 31020221210047. The next prime is 31020221210149. The reversal of 31020221210113 is 31101212202013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15884752282624 + 15135468927489 = 3985568^2 + 3890433^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020221210113 - 2⁴¹ = 28821197954561 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020221210413) 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, 15510110605056 + 15510110605057.

It is an arithmetic number, because the mean of its divisors is an integer number (15510110605057).

Almost surely, 2^{31020221210113} is an apocalyptic number.

It is an amenable number.

31020221210113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020221210113 is an equidigital number, since it uses as much as digits as its factorization.

31020221210113 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 19.

Adding to 31020221210113 its reverse (31101212202013), we get a palindrome (62121433412126).

The spelling of 31020221210113 in words is "thirty-one trillion, twenty billion, two hundred twenty-one million, two hundred ten thousand, one hundred thirteen".