211503321320 has 16 divisors (see below), whose sum is σ = 475882473060. Its totient is φ = 84601328512.

The previous prime is 211503321277. The next prime is 211503321329. The reversal of 211503321320 is 23123305112.

It can be written as a sum of positive squares in 2 ways, for example, as 211366384516 + 136936804 = 459746^2 + 11702^2 .

It is not an unprimeable number, because it can be changed into a prime (211503321329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2643791477 + ... + 2643791556.

Almost surely, 2^211503321320 is an apocalyptic number.

211503321320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211503321320 is an abundant number, since it is smaller than the sum of its proper divisors (264379151740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211503321320 is a wasteful number, since it uses less digits than its factorization.

211503321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5287583044 (or 5287583040 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 211503321320 its reverse (23123305112), we get a palindrome (234626626432).

The spelling of 211503321320 in words is "two hundred eleven billion, five hundred three million, three hundred twenty-one thousand, three hundred twenty".