201101221011220 has 24 divisors (see below), whose sum is σ = 422767152498600. Its totient is φ = 80353900142592.

The previous prime is 201101221011211. The next prime is 201101221011221. The reversal of 201101221011220 is 22110122101102.

It can be written as a sum of positive squares in 4 ways, for example, as 23828026908816 + 177273194102404 = 4881396^2 + 13314398^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201101221011194 and 201101221011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101221011221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5411747325 + ... + 5411784484.

It is an arithmetic number, because the mean of its divisors is an integer number (17615298020775).

Almost surely, 2^{201101221011220} is an apocalyptic number.

201101221011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201101221011220 is an abundant number, since it is smaller than the sum of its proper divisors (221665931487380).

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

201101221011220 is a wasteful number, since it uses less digits than its factorization.

201101221011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10823532747 (or 10823532745 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201101221011220 its reverse (22110122101102), we get a palindrome (223211343112322).

The spelling of 201101221011220 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-one million, eleven thousand, two hundred twenty".