211213202312081 has 2 divisors, whose sum is σ = 211213202312082. Its totient is φ = 211213202312080.

The previous prime is 211213202312059. The next prime is 211213202312141. The reversal of 211213202312081 is 180213202312112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193397973697600 + 17815228614481 = 13906760^2 + 4220809^2 .

It is a cyclic number.

It is not a de Polignac number, because 211213202312081 - 2⁶ = 211213202312017 is a prime.

It is a super-2 number, since 2×211213202312081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211213202312881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606601156040 + 105606601156041.

It is an arithmetic number, because the mean of its divisors is an integer number (105606601156041).

Almost surely, 2^{211213202312081} is an apocalyptic number.

It is an amenable number.

211213202312081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211213202312081 is an equidigital number, since it uses as much as digits as its factorization.

211213202312081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

Adding to 211213202312081 its reverse (180213202312112), we get a palindrome (391426404624193).

The spelling of 211213202312081 in words is "two hundred eleven trillion, two hundred thirteen billion, two hundred two million, three hundred twelve thousand, eighty-one".