21130202203193 has 2 divisors, whose sum is σ = 21130202203194. Its totient is φ = 21130202203192.

The previous prime is 21130202203177. The next prime is 21130202203247. The reversal of 21130202203193 is 39130220203112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21100315746064 + 29886457129 = 4593508^2 + 172877^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130202203193 - 2⁴ = 21130202203177 is a prime.

It is a super-2 number, since 2×21130202203193² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21130202203153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565101101596 + 10565101101597.

It is an arithmetic number, because the mean of its divisors is an integer number (10565101101597).

Almost surely, 2^{21130202203193} is an apocalyptic number.

It is an amenable number.

21130202203193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130202203193 is an equidigital number, since it uses as much as digits as its factorization.

21130202203193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21130202203193 in words is "twenty-one trillion, one hundred thirty billion, two hundred two million, two hundred three thousand, one hundred ninety-three".