20012112221117 has 2 divisors, whose sum is σ = 20012112221118. Its totient is φ = 20012112221116.

The previous prime is 20012112221099. The next prime is 20012112221141. The reversal of 20012112221117 is 71112221121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17002543015396 + 3009569205721 = 4123414^2 + 1734811^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012112221117 - 2⁶ = 20012112221053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012112221092 and 20012112221101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012112221417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006056110558 + 10006056110559.

It is an arithmetic number, because the mean of its divisors is an integer number (10006056110559).

Almost surely, 2^{20012112221117} is an apocalyptic number.

It is an amenable number.

20012112221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012112221117 is an equidigital number, since it uses as much as digits as its factorization.

20012112221117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 20012112221117 its reverse (71112221121002), we get a palindrome (91124333342119).

The spelling of 20012112221117 in words is "twenty trillion, twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred seventeen".