210221221222220 has 96 divisors (see below), whose sum is σ = 475662427833600. Its totient is φ = 77581123925760.

The previous prime is 210221221222193. The next prime is 210221221222247. The reversal of 210221221222220 is 22222122122012.

It is an interprime number because it is at equal distance from previous prime (210221221222193) and next prime (210221221222247).

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, 5400931679 + ... + 5400970601.

It is an arithmetic number, because the mean of its divisors is an integer number (4954816956600).

Almost surely, 2^{210221221222220} is an apocalyptic number.

210221221222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221221222220 is an abundant number, since it is smaller than the sum of its proper divisors (265441206611380).

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

210221221222220 is a wasteful number, since it uses less digits than its factorization.

210221221222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48855 (or 48853 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 210221221222220 its reverse (22222122122012), we get a palindrome (232443343344232).

The spelling of 210221221222220 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".