201022101021220 has 12 divisors (see below), whose sum is σ = 422146412144604. Its totient is φ = 80408840408480.

The previous prime is 201022101021199. The next prime is 201022101021283. The reversal of 201022101021220 is 22120101220102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31178442742756 + 169843658278464 = 5583766^2 + 13032408^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201022101021194 and 201022101021203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025552525511 + ... + 5025552525550.

It is an arithmetic number, because the mean of its divisors is an integer number (35178867678717).

Almost surely, 2^{201022101021220} is an apocalyptic number.

201022101021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201022101021220 is an abundant number, since it is smaller than the sum of its proper divisors (221124311123384).

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

201022101021220 is a wasteful number, since it uses less digits than its factorization.

201022101021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051105051070 (or 10051105051068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201022101021220 its reverse (22120101220102), we get a palindrome (223142202241322).

The spelling of 201022101021220 in words is "two hundred one trillion, twenty-two billion, one hundred one million, twenty-one thousand, two hundred twenty".