202121030113 has 2 divisors, whose sum is σ = 202121030114. Its totient is φ = 202121030112.

The previous prime is 202121030077. The next prime is 202121030119. The reversal of 202121030113 is 311030121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200258935009 + 1862095104 = 447503^2 + 43152^2 .

It is a cyclic number.

It is not a de Polignac number, because 202121030113 - 2¹⁷ = 202120899041 is a prime.

It is not a weakly prime, because it can be changed into another prime (202121030119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060515056 + 101060515057.

It is an arithmetic number, because the mean of its divisors is an integer number (101060515057).

Almost surely, 2^202121030113 is an apocalyptic number.

It is an amenable number.

202121030113 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121030113 is an equidigital number, since it uses as much as digits as its factorization.

202121030113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 202121030113 its reverse (311030121202), we get a palindrome (513151151315).

The spelling of 202121030113 in words is "two hundred two billion, one hundred twenty-one million, thirty thousand, one hundred thirteen".