210021220021220 has 48 divisors (see below), whose sum is σ = 448317573838848. Its totient is φ = 82623415244160.

The previous prime is 210021220021127. The next prime is 210021220021253. The reversal of 210021220021220 is 22120022120012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4586429 + ... + 21001851.

It is an arithmetic number, because the mean of its divisors is an integer number (9339949454976).

Almost surely, 2^{210021220021220} is an apocalyptic number.

210021220021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021220021220 is an abundant number, since it is smaller than the sum of its proper divisors (238296353817628).

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

210021220021220 is a wasteful number, since it uses less digits than its factorization.

210021220021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16425980 (or 16425978 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210021220021220 its reverse (22120022120012), we get a palindrome (232141242141232).

The spelling of 210021220021220 in words is "two hundred ten trillion, twenty-one billion, two hundred twenty million, twenty-one thousand, two hundred twenty".