211311020 has 36 divisors (see below), whose sum is σ = 471404640. Its totient is φ = 79550208.

The previous prime is 211310993. The next prime is 211311029. The reversal of 211311020 is 20113112.

211311020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211310992 and 211311010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211311029) 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 11 ways as a sum of consecutive naturals, for example, 12500 + ... + 24059.

Almost surely, 2^211311020 is an apocalyptic number.

211311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211311020 is an abundant number, since it is smaller than the sum of its proper divisors (260093620).

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

211311020 is a wasteful number, since it uses less digits than its factorization.

211311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36602 (or 36583 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 211311020 is about 14536.5408539996. The cubic root of 211311020 is about 595.6265508780.

Adding to 211311020 its reverse (20113112), we get a palindrome (231424132).

The spelling of 211311020 in words is "two hundred eleven million, three hundred eleven thousand, twenty".