211012120 has 128 divisors (see below), whose sum is σ = 559872000. Its totient is φ = 70766080.

The previous prime is 211012103. The next prime is 211012127. The reversal of 211012120 is 21210112.

It is a super-2 number, since 2×211012120² = 89052229573788800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 211012097 and 211012106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293121 + ... + 293839.

It is an arithmetic number, because the mean of its divisors is an integer number (4374000).

Almost surely, 2^211012120 is an apocalyptic number.

211012120 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 211012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279936000).

211012120 is an abundant number, since it is smaller than the sum of its proper divisors (348859880).

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

211012120 is a wasteful number, since it uses less digits than its factorization.

211012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 211012120 is about 14526.2562279481. The cubic root of 211012120 is about 595.3455799113.

Adding to 211012120 its reverse (21210112), we get a palindrome (232222232).

The spelling of 211012120 in words is "two hundred eleven million, twelve thousand, one hundred twenty".