1211202221120 has 56 divisors (see below), whose sum is σ = 2884714199064. Its totient is φ = 484390363136.

The previous prime is 1211202221087. The next prime is 1211202221209. The reversal of 1211202221120 is 211222021121.

It can be written as a sum of positive squares in 4 ways, for example, as 210049889344 + 1001152331776 = 458312^2 + 1000576^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374842 + ... + 2076678.

Almost surely, 2^{1211202221120} is an apocalyptic number.

1211202221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211202221120 is an abundant number, since it is smaller than the sum of its proper divisors (1673511977944).

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

1211202221120 is an equidigital number, since it uses as much as digits as its factorization.

1211202221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707247 (or 707237 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211202221120 its reverse (211222021121), we get a palindrome (1422424242241).

The spelling of 1211202221120 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty".