211155412205 has 8 divisors (see below), whose sum is σ = 259566653304. Its totient is φ = 164804224000.

The previous prime is 211155412177. The next prime is 211155412243. The reversal of 211155412205 is 502214551112.

It can be written as a sum of positive squares in 4 ways, for example, as 75811849 + 211079600356 = 8707^2 + 459434^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211155412205 - 2¹² = 211155408109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515012996 + ... + 515013405.

It is an arithmetic number, because the mean of its divisors is an integer number (32445831663).

Almost surely, 2^211155412205 is an apocalyptic number.

It is an amenable number.

211155412205 is a deficient number, since it is larger than the sum of its proper divisors (48411241099).

211155412205 is a wasteful number, since it uses less digits than its factorization.

211155412205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030026447.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 211155412205 its reverse (502214551112), we get a palindrome (713369963317).

The spelling of 211155412205 in words is "two hundred eleven billion, one hundred fifty-five million, four hundred twelve thousand, two hundred five".