211011001205 has 8 divisors (see below), whose sum is σ = 255536259000. Its totient is φ = 167260095936.

The previous prime is 211011001171. The next prime is 211011001207. The reversal of 211011001205 is 502100110112.

211011001205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30033929809 + 180977071396 = 173303^2 + 425414^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211011001205 - 2³⁰ = 209937259381 is a prime.

It is a super-2 number, since 2×211011001205² (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 211011001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211011001207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193587530 + ... + 193588619.

It is an arithmetic number, because the mean of its divisors is an integer number (31942032375).

Almost surely, 2^211011001205 is an apocalyptic number.

It is an amenable number.

211011001205 is a deficient number, since it is larger than the sum of its proper divisors (44525257795).

211011001205 is a wasteful number, since it uses less digits than its factorization.

211011001205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387176263.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 211011001205 its reverse (502100110112), we get a palindrome (713111111317).

The spelling of 211011001205 in words is "two hundred eleven billion, eleven million, one thousand, two hundred five".