21230200112237 has 2 divisors, whose sum is σ = 21230200112238. Its totient is φ = 21230200112236.

The previous prime is 21230200112221. The next prime is 21230200112281. The reversal of 21230200112237 is 73221100203212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17440738316521 + 3789461795716 = 4176211^2 + 1946654^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230200112237 - 2⁴ = 21230200112221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130200112237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615100056118 + 10615100056119.

It is an arithmetic number, because the mean of its divisors is an integer number (10615100056119).

Almost surely, 2^{21230200112237} is an apocalyptic number.

It is an amenable number.

21230200112237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230200112237 is an equidigital number, since it uses as much as digits as its factorization.

21230200112237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 21230200112237 its reverse (73221100203212), we get a palindrome (94451300315449).

The spelling of 21230200112237 in words is "twenty-one trillion, two hundred thirty billion, two hundred million, one hundred twelve thousand, two hundred thirty-seven".