211242312106 has 24 divisors (see below), whose sum is σ = 375550935300. Its totient is φ = 88824258432.

The previous prime is 211242312101. The next prime is 211242312109. The reversal of 211242312106 is 601213242112.

It can be written as a sum of positive squares in 2 ways, for example, as 170783001081 + 40459311025 = 413259^2 + 201145^2 .

It is not an unprimeable number, because it can be changed into a prime (211242312101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20330031 + ... + 20340418.

Almost surely, 2^211242312106 is an apocalyptic number.

211242312106 is a deficient number, since it is larger than the sum of its proper divisors (164308623194).

211242312106 is a wasteful number, since it uses less digits than its factorization.

211242312106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40670518 (or 40670511 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 211242312106 its reverse (601213242112), we get a palindrome (812455554218).

The spelling of 211242312106 in words is "two hundred eleven billion, two hundred forty-two million, three hundred twelve thousand, one hundred six".