210101221220 has 48 divisors (see below), whose sum is σ = 481353969600. Its totient is φ = 76395496320.

The previous prime is 210101221207. The next prime is 210101221243. The reversal of 210101221220 is 22122101012.

It is a junction number, because it is equal to n+sod(n) for n = 210101221195 and 210101221204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6537551 + ... + 6569609.

It is an arithmetic number, because the mean of its divisors is an integer number (10028207700).

Almost surely, 2^210101221220 is an apocalyptic number.

210101221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210101221220 is an abundant number, since it is smaller than the sum of its proper divisors (271252748380).

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

210101221220 is a wasteful number, since it uses less digits than its factorization.

210101221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61868 (or 61866 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210101221220 its reverse (22122101012), we get a palindrome (232223322232).

The spelling of 210101221220 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty".