20000121020599 has 2 divisors, whose sum is σ = 20000121020600. Its totient is φ = 20000121020598.

The previous prime is 20000121020597. The next prime is 20000121020639. The reversal of 20000121020599 is 99502012100002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20000121020599 - 2¹ = 20000121020597 is a prime.

Together with 20000121020597, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20000121020599.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 10000060510299 + 10000060510300.

It is an arithmetic number, because the mean of its divisors is an integer number (10000060510300).

Almost surely, 2^{20000121020599} is an apocalyptic number.

20000121020599 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000121020599 is an equidigital number, since it uses as much as digits as its factorization.

20000121020599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 20000121020599 in words is "twenty trillion, one hundred twenty-one million, twenty thousand, five hundred ninety-nine".