210212221221020 has 24 divisors (see below), whose sum is σ = 441742135858800. Its totient is φ = 84028417765632.

The previous prime is 210212221220983. The next prime is 210212221221031. The reversal of 210212221221020 is 20122122212012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 210212221220983 and 210212221221001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529389650 + ... + 3529449209.

It is an arithmetic number, because the mean of its divisors is an integer number (18405922327450).

Almost surely, 2^{210212221221020} is an apocalyptic number.

210212221221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210212221221020 is an abundant number, since it is smaller than the sum of its proper divisors (231529914637780).

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

210212221221020 is a wasteful number, since it uses less digits than its factorization.

210212221221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7058840357 (or 7058840355 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210212221221020 its reverse (20122122212012), we get a palindrome (230334343433032).

The spelling of 210212221221020 in words is "two hundred ten trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty".