21211110122063 has 2 divisors, whose sum is σ = 21211110122064. Its totient is φ = 21211110122062.

The previous prime is 21211110122003. The next prime is 21211110122071. The reversal of 21211110122063 is 36022101111212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211110122063 is a prime.

It is a super-2 number, since 2×21211110122063² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211110122003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605555061031 + 10605555061032.

It is an arithmetic number, because the mean of its divisors is an integer number (10605555061032).

Almost surely, 2^{21211110122063} is an apocalyptic number.

21211110122063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211110122063 is an equidigital number, since it uses as much as digits as its factorization.

21211110122063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 21211110122063 its reverse (36022101111212), we get a palindrome (57233211233275).

The spelling of 21211110122063 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, one hundred twenty-two thousand, sixty-three".