221202122221120 has 28 divisors (see below), whose sum is σ = 526737553539804. Its totient is φ = 88480848888320.

The previous prime is 221202122221111. The next prime is 221202122221139. The reversal of 221202122221120 is 21122221202122.

It can be written as a sum of positive squares in 2 ways, for example, as 137105739334656 + 84096382886464 = 11709216^2 + 9170408^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221202122221091 and 221202122221100.

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, 345628315651 + ... + 345628316290.

Almost surely, 2^{221202122221120} is an apocalyptic number.

221202122221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221202122221120 is an abundant number, since it is smaller than the sum of its proper divisors (305535431318684).

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

221202122221120 is an equidigital number, since it uses as much as digits as its factorization.

221202122221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691256631958 (or 691256631948 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221202122221120 its reverse (21122221202122), we get a palindrome (242324343423242).

The spelling of 221202122221120 in words is "two hundred twenty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty".