211242312105 has 16 divisors (see below), whose sum is σ = 368713854144. Its totient is φ = 102420514880.

The previous prime is 211242312101. The next prime is 211242312109. The reversal of 211242312105 is 501213242112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211242312101) and next prime (211242312109).

It is not a de Polignac number, because 211242312105 - 2² = 211242312101 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 640128054 + ... + 640128383.

It is an arithmetic number, because the mean of its divisors is an integer number (23044615884).

Almost surely, 2^211242312105 is an apocalyptic number.

It is an amenable number.

211242312105 is a deficient number, since it is larger than the sum of its proper divisors (157471542039).

211242312105 is a wasteful number, since it uses less digits than its factorization.

211242312105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280256456.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 211242312105 its reverse (501213242112), we get a palindrome (712455554217).

The spelling of 211242312105 in words is "two hundred eleven billion, two hundred forty-two million, three hundred twelve thousand, one hundred five".