20212220113 has 2 divisors, whose sum is σ = 20212220114. Its totient is φ = 20212220112.

The previous prime is 20212220111. The next prime is 20212220173. The reversal of 20212220113 is 31102221202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16824165264 + 3388054849 = 129708^2 + 58207^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212220113 - 2¹ = 20212220111 is a prime.

Together with 20212220111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20212220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106110056 + 10106110057.

It is an arithmetic number, because the mean of its divisors is an integer number (10106110057).

Almost surely, 2^20212220113 is an apocalyptic number.

It is an amenable number.

20212220113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212220113 is an equidigital number, since it uses as much as digits as its factorization.

20212220113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20212220113 its reverse (31102221202), we get a palindrome (51314441315).

The spelling of 20212220113 in words is "twenty billion, two hundred twelve million, two hundred twenty thousand, one hundred thirteen".