211236020450505 has 24 divisors (see below), whose sum is σ = 366153391548672. Its totient is φ = 112655839798944.

The previous prime is 211236020450459. The next prime is 211236020450519. The reversal of 211236020450505 is 505054020632112.

211236020450505 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 3 + 602 + 0 + 45 + 0 + 5 + 0 + 5 = 666.

It is not a de Polignac number, because 211236020450505 - 2²⁵ = 211235986896073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211236020450505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68710489 + ... + 71718918.

It is an arithmetic number, because the mean of its divisors is an integer number (15256391314528).

Almost surely, 2^{211236020450505} is an apocalyptic number.

It is an amenable number.

211236020450505 is a deficient number, since it is larger than the sum of its proper divisors (154917371098167).

211236020450505 is a wasteful number, since it uses less digits than its factorization.

211236020450505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140462845 (or 140462842 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 211236020450505 in words is "two hundred eleven trillion, two hundred thirty-six billion, twenty million, four hundred fifty thousand, five hundred five".