210000212220 has 96 divisors (see below), whose sum is σ = 623069169408. Its totient is φ = 52665275392.

The previous prime is 210000212179. The next prime is 210000212239. The reversal of 210000212220 is 22212000012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210000212196 and 210000212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1254379 + ... + 1411901.

It is an arithmetic number, because the mean of its divisors is an integer number (6490303848).

Almost surely, 2^210000212220 is an apocalyptic number.

210000212220 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 210000212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311534584704).

210000212220 is an abundant number, since it is smaller than the sum of its proper divisors (413068957188).

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

210000212220 is a wasteful number, since it uses less digits than its factorization.

210000212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158859 (or 158857 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 210000212220 its reverse (22212000012), we get a palindrome (232212212232).

The spelling of 210000212220 in words is "two hundred ten billion, two hundred twelve thousand, two hundred twenty".