1222220021020 has 12 divisors (see below), whose sum is σ = 2566662044184. Its totient is φ = 488888008400.

The previous prime is 1222220020997. The next prime is 1222220021047. The reversal of 1222220021020 is 201200222221.

It is a junction number, because it is equal to n+sod(n) for n = 1222220020985 and 1222220021003.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 30555500506 + ... + 30555500545.

It is an arithmetic number, because the mean of its divisors is an integer number (213888503682).

Almost surely, 2^{1222220021020} is an apocalyptic number.

1222220021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222220021020 is an abundant number, since it is smaller than the sum of its proper divisors (1344442023164).

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

1222220021020 is a wasteful number, since it uses less digits than its factorization.

1222220021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61111001060 (or 61111001058 counting only the distinct ones).

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

Adding to 1222220021020 its reverse (201200222221), we get a palindrome (1423420243241).

The spelling of 1222220021020 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, twenty-one thousand, twenty".