21002012200193 has 2 divisors, whose sum is σ = 21002012200194. Its totient is φ = 21002012200192.

The previous prime is 21002012200187. The next prime is 21002012200217. The reversal of 21002012200193 is 39100221020012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20985496866049 + 16515334144 = 4580993^2 + 128512^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002012200193 - 2⁴ = 21002012200177 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002012200093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501006100096 + 10501006100097.

It is an arithmetic number, because the mean of its divisors is an integer number (10501006100097).

Almost surely, 2^{21002012200193} is an apocalyptic number.

It is an amenable number.

21002012200193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002012200193 is an equidigital number, since it uses as much as digits as its factorization.

21002012200193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 21002012200193 in words is "twenty-one trillion, two billion, twelve million, two hundred thousand, one hundred ninety-three".