202130999989 has 2 divisors, whose sum is σ = 202130999990. Its totient is φ = 202130999988.

The previous prime is 202130999971. The next prime is 202131000013. The reversal of 202130999989 is 989999031202.

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., 160440302500 + 41690697489 = 400550^2 + 204183^2 .

It is a cyclic number.

It is not a de Polignac number, because 202130999989 - 2¹¹ = 202130997941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202130999969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065499994 + 101065499995.

It is an arithmetic number, because the mean of its divisors is an integer number (101065499995).

Almost surely, 2^202130999989 is an apocalyptic number.

It is an amenable number.

202130999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

202130999989 is an equidigital number, since it uses as much as digits as its factorization.

202130999989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5668704, while the sum is 61.

The spelling of 202130999989 in words is "two hundred two billion, one hundred thirty million, nine hundred ninety-nine thousand, nine hundred eighty-nine".