211012012220 has 96 divisors (see below), whose sum is σ = 471942434880. Its totient is φ = 79024619520.

The previous prime is 211012012187. The next prime is 211012012223. The reversal of 211012012220 is 22210210112.

It is a super-2 number, since 2×211012012220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211012012195 and 211012012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012012223) 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 31 ways as a sum of consecutive naturals, for example, 15150860 + ... + 15164780.

It is an arithmetic number, because the mean of its divisors is an integer number (4916067030).

Almost surely, 2^211012012220 is an apocalyptic number.

211012012220 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 211012012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235971217440).

211012012220 is an abundant number, since it is smaller than the sum of its proper divisors (260930422660).

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

211012012220 is a wasteful number, since it uses less digits than its factorization.

211012012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14415 (or 14413 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211012012220 its reverse (22210210112), we get a palindrome (233222222332).

The spelling of 211012012220 in words is "two hundred eleven billion, twelve million, twelve thousand, two hundred twenty".