201021110101220 has 24 divisors (see below), whose sum is σ = 444362453908800. Its totient is φ = 76176420669792.

The previous prime is 201021110101213. The next prime is 201021110101271. The reversal of 201021110101220 is 22101011120102.

It is a junction number, because it is equal to n+sod(n) for n = 201021110101195 and 201021110101204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264501460280 + ... + 264501461039.

It is an arithmetic number, because the mean of its divisors is an integer number (18515102246200).

Almost surely, 2^{201021110101220} is an apocalyptic number.

201021110101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021110101220 is an abundant number, since it is smaller than the sum of its proper divisors (243341343807580).

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

201021110101220 is a wasteful number, since it uses less digits than its factorization.

201021110101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529002921347 (or 529002921345 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201021110101220 its reverse (22101011120102), we get a palindrome (223122121221322).

The spelling of 201021110101220 in words is "two hundred one trillion, twenty-one billion, one hundred ten million, one hundred one thousand, two hundred twenty".