211310021320 has 16 divisors (see below), whose sum is σ = 475447548060. Its totient is φ = 84524008512.

The previous prime is 211310021317. The next prime is 211310021327. The reversal of 211310021320 is 23120013112.

It can be written as a sum of positive squares in 2 ways, for example, as 201290411716 + 10019609604 = 448654^2 + 100098^2 .

It is a super-2 number, since 2×211310021320² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211310021294 and 211310021303.

It is not an unprimeable number, because it can be changed into a prime (211310021327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2641375227 + ... + 2641375306.

Almost surely, 2^211310021320 is an apocalyptic number.

211310021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211310021320 is an abundant number, since it is smaller than the sum of its proper divisors (264137526740).

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

211310021320 is a wasteful number, since it uses less digits than its factorization.

211310021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282750544 (or 5282750540 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 211310021320 its reverse (23120013112), we get a palindrome (234430034432).

The spelling of 211310021320 in words is "two hundred eleven billion, three hundred ten million, twenty-one thousand, three hundred twenty".