210221212020120 has 512 divisors, whose sum is σ = 808331640883200. Its totient is φ = 47603112321024.

The previous prime is 210221212020103. The next prime is 210221212020161. The reversal of 210221212020120 is 21020212122012.

It is a happy number.

210221212020120 is a `hidden beast` number, since 2 + 10 + 221 + 212 + 0 + 201 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210221212020093 and 210221212020102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 385431124 + ... + 385976156.

It is an arithmetic number, because the mean of its divisors is an integer number (1578772736100).

Almost surely, 2^{210221212020120} is an apocalyptic number.

210221212020120 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 210221212020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404165820441600).

210221212020120 is an abundant number, since it is smaller than the sum of its proper divisors (598110428863080).

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

210221212020120 is a wasteful number, since it uses less digits than its factorization.

210221212020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545536 (or 545526 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210221212020120 its reverse (21020212122012), we get a palindrome (231241424142132).

The spelling of 210221212020120 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twelve million, twenty thousand, one hundred twenty".