200120121020999 has 2 divisors, whose sum is σ = 200120121021000. Its totient is φ = 200120121020998.

The previous prime is 200120121020993. The next prime is 200120121021011. The reversal of 200120121020999 is 999020121021002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200120121020999 - 2¹² = 200120121016903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200120121020993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060060510499 + 100060060510500.

It is an arithmetic number, because the mean of its divisors is an integer number (100060060510500).

Almost surely, 2^{200120121020999} is an apocalyptic number.

200120121020999 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120121020999 is an equidigital number, since it uses as much as digits as its factorization.

200120121020999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 200120121020999 in words is "two hundred trillion, one hundred twenty billion, one hundred twenty-one million, twenty thousand, nine hundred ninety-nine".