212000001220 has 96 divisors (see below), whose sum is σ = 513010713600. Its totient is φ = 72084904320.

The previous prime is 212000001197. The next prime is 212000001221. The reversal of 212000001220 is 22100000212.

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 = 212000001197 and 212000001206.

It is not an unprimeable number, because it can be changed into a prime (212000001221) 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, 41574231 + ... + 41579329.

It is an arithmetic number, because the mean of its divisors is an integer number (5343861600).

Almost surely, 2^212000001220 is an apocalyptic number.

212000001220 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 212000001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256505356800).

212000001220 is an abundant number, since it is smaller than the sum of its proper divisors (301010712380).

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

212000001220 is a wasteful number, since it uses less digits than its factorization.

212000001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513 (or 7511 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 212000001220 its reverse (22100000212), we get a palindrome (234100001432).

The spelling of 212000001220 in words is "two hundred twelve billion, one thousand, two hundred twenty".