200001230000021 has 2 divisors, whose sum is σ = 200001230000022. Its totient is φ = 200001230000020.

The previous prime is 200001229999969. The next prime is 200001230000027. The reversal of 200001230000021 is 120000032100002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199668486768100 + 332743231921 = 14130410^2 + 576839^2 .

It is a cyclic number.

It is not a de Polignac number, because 200001230000021 - 2⁶ = 200001229999957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200001229999957 and 200001230000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200001230000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000615000010 + 100000615000011.

It is an arithmetic number, because the mean of its divisors is an integer number (100000615000011).

Almost surely, 2^{200001230000021} is an apocalyptic number.

It is an amenable number.

200001230000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200001230000021 is an equidigital number, since it uses as much as digits as its factorization.

200001230000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 200001230000021 its reverse (120000032100002), we get a palindrome (320001262100023).

The spelling of 200001230000021 in words is "two hundred trillion, one billion, two hundred thirty million, twenty-one", and thus it is an aban number.