21210101200207 has 2 divisors, whose sum is σ = 21210101200208. Its totient is φ = 21210101200206.

The previous prime is 21210101200139. The next prime is 21210101200231. The reversal of 21210101200207 is 70200210101212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210101200207 - 2¹⁹ = 21210100675919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210101200237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605050600103 + 10605050600104.

It is an arithmetic number, because the mean of its divisors is an integer number (10605050600104).

Almost surely, 2^{21210101200207} is an apocalyptic number.

21210101200207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210101200207 is an equidigital number, since it uses as much as digits as its factorization.

21210101200207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 21210101200207 its reverse (70200210101212), we get a palindrome (91410311301419).

The spelling of 21210101200207 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred thousand, two hundred seven".