211211212073 has 2 divisors, whose sum is σ = 211211212074. Its totient is φ = 211211212072.

The previous prime is 211211212063. The next prime is 211211212109. The reversal of 211211212073 is 370212112112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197022352384 + 14188859689 = 443872^2 + 119117^2 .

It is a cyclic number.

It is not a de Polignac number, because 211211212073 - 2²⁰ = 211210163497 is a prime.

It is a super-2 number, since 2×211211212073² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211211212063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605606036 + 105605606037.

It is an arithmetic number, because the mean of its divisors is an integer number (105605606037).

Almost surely, 2^211211212073 is an apocalyptic number.

It is an amenable number.

211211212073 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211212073 is an equidigital number, since it uses as much as digits as its factorization.

211211212073 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 23.

Adding to 211211212073 its reverse (370212112112), we get a palindrome (581423324185).

The spelling of 211211212073 in words is "two hundred eleven billion, two hundred eleven million, two hundred twelve thousand, seventy-three".