211242312097 has 4 divisors (see below), whose sum is σ = 211411442500. Its totient is φ = 211073181696.

The previous prime is 211242312091. The next prime is 211242312101. The reversal of 211242312097 is 790213242112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56340244321 + 154902067776 = 237361^2 + 393576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211242312097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211242312091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84563328 + ... + 84565825.

It is an arithmetic number, because the mean of its divisors is an integer number (52852860625).

Almost surely, 2^211242312097 is an apocalyptic number.

It is an amenable number.

211242312097 is a deficient number, since it is larger than the sum of its proper divisors (169130403).

211242312097 is a wasteful number, since it uses less digits than its factorization.

211242312097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169130402.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 211242312097 in words is "two hundred eleven billion, two hundred forty-two million, three hundred twelve thousand, ninety-seven".