1222202001220 has 24 divisors (see below), whose sum is σ = 2566645339608. Its totient is φ = 488876774400.

The previous prime is 1222202001211. The next prime is 1222202001259. The reversal of 1222202001220 is 221002022221.

It can be written as a sum of positive squares in 4 ways, for example, as 50538636864 + 1171663364356 = 224808^2 + 1082434^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1222202001194 and 1222202001203.

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 7 ways as a sum of consecutive naturals, for example, 3943510 + ... + 4242130.

It is an arithmetic number, because the mean of its divisors is an integer number (106943555817).

Almost surely, 2^{1222202001220} is an apocalyptic number.

1222202001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222202001220 is an abundant number, since it is smaller than the sum of its proper divisors (1344443338388).

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

1222202001220 is a wasteful number, since it uses less digits than its factorization.

1222202001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503271 (or 503269 counting only the distinct ones).

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

Adding to 1222202001220 its reverse (221002022221), we get a palindrome (1443204023441).

The spelling of 1222202001220 in words is "one trillion, two hundred twenty-two billion, two hundred two million, one thousand, two hundred twenty".