211212012073 has 2 divisors, whose sum is σ = 211212012074. Its totient is φ = 211212012072.

The previous prime is 211212011987. The next prime is 211212012107. The reversal of 211212012073 is 370210212112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188219748649 + 22992263424 = 433843^2 + 151632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211212012073 is a prime.

It is a super-2 number, since 2×211212012073² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211212012773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606006036 + 105606006037.

It is an arithmetic number, because the mean of its divisors is an integer number (105606006037).

Almost surely, 2^211212012073 is an apocalyptic number.

It is an amenable number.

211212012073 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212012073 is an equidigital number, since it uses as much as digits as its factorization.

211212012073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 211212012073 its reverse (370210212112), we get a palindrome (581422224185).

The spelling of 211212012073 in words is "two hundred eleven billion, two hundred twelve million, twelve thousand, seventy-three".