211020311005 has 32 divisors (see below), whose sum is σ = 291311956224. Its totient is φ = 143744150016.

The previous prime is 211020310993. The next prime is 211020311023. The reversal of 211020311005 is 500113020112.

211020311005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211020311005 - 2¹⁵ = 211020278237 is a prime.

It is a super-2 number, since 2×211020311005² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211020311005.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 14100987 + ... + 14115943.

It is an arithmetic number, because the mean of its divisors is an integer number (9103498632).

Almost surely, 2^211020311005 is an apocalyptic number.

It is an amenable number.

211020311005 is a deficient number, since it is larger than the sum of its proper divisors (80291645219).

211020311005 is a wasteful number, since it uses less digits than its factorization.

211020311005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17605.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 211020311005 its reverse (500113020112), we get a palindrome (711133331117).

The spelling of 211020311005 in words is "two hundred eleven billion, twenty million, three hundred eleven thousand, five".