20021220011113 has 2 divisors, whose sum is σ = 20021220011114. Its totient is φ = 20021220011112.

The previous prime is 20021220011083. The next prime is 20021220011123. The reversal of 20021220011113 is 31111002212002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11612194382889 + 8409025628224 = 3407667^2 + 2899832^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021220011113 - 2²⁹ = 20020683140201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021220011123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010610005556 + 10010610005557.

It is an arithmetic number, because the mean of its divisors is an integer number (10010610005557).

Almost surely, 2^{20021220011113} is an apocalyptic number.

It is an amenable number.

20021220011113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021220011113 is an equidigital number, since it uses as much as digits as its factorization.

20021220011113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20021220011113 its reverse (31111002212002), we get a palindrome (51132222223115).

The spelling of 20021220011113 in words is "twenty trillion, twenty-one billion, two hundred twenty million, eleven thousand, one hundred thirteen".