212333222081 has 2 divisors, whose sum is σ = 212333222082. Its totient is φ = 212333222080.

The previous prime is 212333222071. The next prime is 212333222099. The reversal of 212333222081 is 180222333212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108378565681 + 103954656400 = 329209^2 + 322420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212333222081 is a prime.

It is a super-2 number, since 2×212333222081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212333222071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106166611040 + 106166611041.

It is an arithmetic number, because the mean of its divisors is an integer number (106166611041).

Almost surely, 2^212333222081 is an apocalyptic number.

It is an amenable number.

212333222081 is a deficient number, since it is larger than the sum of its proper divisors (1).

212333222081 is an equidigital number, since it uses as much as digits as its factorization.

212333222081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 212333222081 its reverse (180222333212), we get a palindrome (392555555293).

The spelling of 212333222081 in words is "two hundred twelve billion, three hundred thirty-three million, two hundred twenty-two thousand, eighty-one".