211011320 has 64 divisors (see below), whose sum is σ = 523242720. Its totient is φ = 76091904.

The previous prime is 211011299. The next prime is 211011331. The reversal of 211011320 is 23110112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17642 + ... + 27078.

Almost surely, 2^211011320 is an apocalyptic number.

211011320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211011320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261621360).

211011320 is an abundant number, since it is smaller than the sum of its proper divisors (312231400).

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

211011320 is a wasteful number, since it uses less digits than its factorization.

211011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504 (or 9500 counting only the distinct ones).

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

The square root of 211011320 is about 14526.2286915772. The cubic root of 211011320 is about 595.3448275421.

Adding to 211011320 its reverse (23110112), we get a palindrome (234121432).

The spelling of 211011320 in words is "two hundred eleven million, eleven thousand, three hundred twenty".