222021001220 has 48 divisors (see below), whose sum is σ = 471613255680. Its totient is φ = 87790760064.

The previous prime is 222021001219. The next prime is 222021001243. The reversal of 222021001220 is 22100120222.

It is a junction number, because it is equal to n+sod(n) for n = 222021001195 and 222021001204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545801 + ... + 861359.

It is an arithmetic number, because the mean of its divisors is an integer number (9825276160).

Almost surely, 2^222021001220 is an apocalyptic number.

222021001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222021001220 is an abundant number, since it is smaller than the sum of its proper divisors (249592254460).

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

222021001220 is a wasteful number, since it uses less digits than its factorization.

222021001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315972 (or 315970 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222021001220 its reverse (22100120222), we get a palindrome (244121121442).

The spelling of 222021001220 in words is "two hundred twenty-two billion, twenty-one million, one thousand, two hundred twenty".