21202112201113 has 2 divisors, whose sum is σ = 21202112201114. Its totient is φ = 21202112201112.

The previous prime is 21202112201089. The next prime is 21202112201129. The reversal of 21202112201113 is 31110221120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17688391943049 + 3513720258064 = 4205757^2 + 1874492^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202112201113 - 2³⁷ = 21064673247641 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202112207113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601056100556 + 10601056100557.

It is an arithmetic number, because the mean of its divisors is an integer number (10601056100557).

Almost surely, 2^{21202112201113} is an apocalyptic number.

It is an amenable number.

21202112201113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202112201113 is an equidigital number, since it uses as much as digits as its factorization.

21202112201113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21202112201113 its reverse (31110221120212), we get a palindrome (52312333321325).

The spelling of 21202112201113 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred one thousand, one hundred thirteen".