211550500105 has 96 divisors (see below), whose sum is σ = 315350703360. Its totient is φ = 135369400320.

The previous prime is 211550500097. The next prime is 211550500121. The reversal of 211550500105 is 501005055112.

It is not a de Polignac number, because 211550500105 - 2³ = 211550500097 is a prime.

It is a super-2 number, since 2×211550500105² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211550500105.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 420577284 + ... + 420577786.

It is an arithmetic number, because the mean of its divisors is an integer number (3284903160).

Almost surely, 2^211550500105 is an apocalyptic number.

It is an amenable number.

211550500105 is a deficient number, since it is larger than the sum of its proper divisors (103800203255).

211550500105 is a wasteful number, since it uses less digits than its factorization.

211550500105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

Adding to 211550500105 its reverse (501005055112), we get a palindrome (712555555217).

The spelling of 211550500105 in words is "two hundred eleven billion, five hundred fifty million, five hundred thousand, one hundred five".