201222201220 has 12 divisors (see below), whose sum is σ = 422566622604. Its totient is φ = 80488880480.

The previous prime is 201222201217. The next prime is 201222201239. The reversal of 201222201220 is 22102222102.

It can be written as a sum of positive squares in 2 ways, for example, as 26044795456 + 175177405764 = 161384^2 + 418542^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201222201194 and 201222201203.

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, 5030555011 + ... + 5030555050.

It is an arithmetic number, because the mean of its divisors is an integer number (35213885217).

Almost surely, 2^201222201220 is an apocalyptic number.

201222201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201222201220 is an abundant number, since it is smaller than the sum of its proper divisors (221344421384).

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

201222201220 is a wasteful number, since it uses less digits than its factorization.

201222201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061110070 (or 10061110068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 201222201220 its reverse (22102222102), we get a palindrome (223324423322).

The spelling of 201222201220 in words is "two hundred one billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty".