211041655109 has 4 divisors (see below), whose sum is σ = 211052976960. Its totient is φ = 211030333260.

The previous prime is 211041655093. The next prime is 211041655177. The reversal of 211041655109 is 901556140112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211041655109 - 2⁴ = 211041655093 is a prime.

It is a super-2 number, since 2×211041655109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211041652109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5632919 + ... + 5670260.

It is an arithmetic number, because the mean of its divisors is an integer number (52763244240).

Almost surely, 2^211041655109 is an apocalyptic number.

It is an amenable number.

211041655109 is a deficient number, since it is larger than the sum of its proper divisors (11321851).

211041655109 is a wasteful number, since it uses less digits than its factorization.

211041655109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11321850.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 211041655109 in words is "two hundred eleven billion, forty-one million, six hundred fifty-five thousand, one hundred nine".