222202002121220 has 72 divisors (see below), whose sum is σ = 530587226093400. Its totient is φ = 78014496017920.

The previous prime is 222202002121213. The next prime is 222202002121243. The reversal of 222202002121220 is 22121200202222.

It can be written as a sum of positive squares in 4 ways, for example, as 34832116711876 + 187369885409344 = 5901874^2 + 13688312^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222202002121192 and 222202002121201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1583016185 + ... + 1583156544.

It is an arithmetic number, because the mean of its divisors is an integer number (7369267029075).

Almost surely, 2^{222202002121220} is an apocalyptic number.

222202002121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222202002121220 is an abundant number, since it is smaller than the sum of its proper divisors (308385223972180).

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

222202002121220 is a wasteful number, since it uses less digits than its factorization.

222202002121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166172789 (or 3166172776 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222202002121220 its reverse (22121200202222), we get a palindrome (244323202323442).

It can be divided in two parts, 222202002 and 121220, that added together give a palindrome (222323222).

The spelling of 222202002121220 in words is "two hundred twenty-two trillion, two hundred two billion, two million, one hundred twenty-one thousand, two hundred twenty".