20000121020597 has 2 divisors, whose sum is σ = 20000121020598. Its totient is φ = 20000121020596.

The previous prime is 20000121020591. The next prime is 20000121020599. The reversal of 20000121020597 is 79502012100002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10663973549476 + 9336147471121 = 3265574^2 + 3055511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000121020597 - 2⁶ = 20000121020533 is a prime.

Together with 20000121020599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000121020591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000060510298 + 10000060510299.

It is an arithmetic number, because the mean of its divisors is an integer number (10000060510299).

Almost surely, 2^{20000121020597} is an apocalyptic number.

It is an amenable number.

20000121020597 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000121020597 is an equidigital number, since it uses as much as digits as its factorization.

20000121020597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 20000121020597 its reverse (79502012100002), we get a palindrome (99502133120599).

The spelling of 20000121020597 in words is "twenty trillion, one hundred twenty-one million, twenty thousand, five hundred ninety-seven".