20302121220113 has 2 divisors, whose sum is σ = 20302121220114. Its totient is φ = 20302121220112.

The previous prime is 20302121220083. The next prime is 20302121220149. The reversal of 20302121220113 is 31102212120302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19190988085504 + 1111133134609 = 4380752^2 + 1054103^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302121220113 - 2⁶ = 20302121220049 is a prime.

It is a super-2 number, since 2×20302121220113² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20302121220163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151060610056 + 10151060610057.

It is an arithmetic number, because the mean of its divisors is an integer number (10151060610057).

Almost surely, 2^{20302121220113} is an apocalyptic number.

It is an amenable number.

20302121220113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302121220113 is an equidigital number, since it uses as much as digits as its factorization.

20302121220113 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 20.

Adding to 20302121220113 its reverse (31102212120302), we get a palindrome (51404333340415).

The spelling of 20302121220113 in words is "twenty trillion, three hundred two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred thirteen".