21011002210207 has 2 divisors, whose sum is σ = 21011002210208. Its totient is φ = 21011002210206.

The previous prime is 21011002210193. The next prime is 21011002210271. The reversal of 21011002210207 is 70201220011012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011002210207 - 2³⁵ = 20976642471839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011002210277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505501105103 + 10505501105104.

It is an arithmetic number, because the mean of its divisors is an integer number (10505501105104).

Almost surely, 2^{21011002210207} is an apocalyptic number.

21011002210207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011002210207 is an equidigital number, since it uses as much as digits as its factorization.

21011002210207 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 21011002210207 its reverse (70201220011012), we get a palindrome (91212222221219).

The spelling of 21011002210207 in words is "twenty-one trillion, eleven billion, two million, two hundred ten thousand, two hundred seven".