20001222113 has 2 divisors, whose sum is σ = 20001222114. Its totient is φ = 20001222112.

The previous prime is 20001222091. The next prime is 20001222149. The reversal of 20001222113 is 31122210002.

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., 17587268689 + 2413953424 = 132617^2 + 49132^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001222113 - 2¹⁶ = 20001156577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20001222013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000611056 + 10000611057.

It is an arithmetic number, because the mean of its divisors is an integer number (10000611057).

Almost surely, 2^20001222113 is an apocalyptic number.

It is an amenable number.

20001222113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001222113 is an equidigital number, since it uses as much as digits as its factorization.

20001222113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20001222113 its reverse (31122210002), we get a palindrome (51123432115).

The spelling of 20001222113 in words is "twenty billion, one million, two hundred twenty-two thousand, one hundred thirteen".