20000121222113 has 2 divisors, whose sum is σ = 20000121222114. Its totient is φ = 20000121222112.

The previous prime is 20000121222047. The next prime is 20000121222139. The reversal of 20000121222113 is 31122212100002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12260558274064 + 7739562948049 = 3501508^2 + 2782007^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000121222113 - 2³⁶ = 19931401745377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000121222091 and 20000121222100.

It is not a weakly prime, because it can be changed into another prime (20000121222173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000060611056 + 10000060611057.

It is an arithmetic number, because the mean of its divisors is an integer number (10000060611057).

Almost surely, 2^{20000121222113} is an apocalyptic number.

It is an amenable number.

20000121222113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000121222113 is an equidigital number, since it uses as much as digits as its factorization.

20000121222113 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 17.

Adding to 20000121222113 its reverse (31122212100002), we get a palindrome (51122333322115).

The spelling of 20000121222113 in words is "twenty trillion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred thirteen".