1221120111202 has 8 divisors (see below), whose sum is σ = 1832751956700. Its totient is φ = 610202792304.

The previous prime is 1221120111157. The next prime is 1221120111271. The reversal of 1221120111202 is 2021110211221.

It can be written as a sum of positive squares in 2 ways, for example, as 1204723564801 + 16396546401 = 1097599^2 + 128049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221120111202² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 178627377 + ... + 178634212.

Almost surely, 2^{1221120111202} is an apocalyptic number.

1221120111202 is a deficient number, since it is larger than the sum of its proper divisors (611631845498).

1221120111202 is a wasteful number, since it uses less digits than its factorization.

1221120111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357263300.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221120111202 its reverse (2021110211221), we get a palindrome (3242230322423).

The spelling of 1221120111202 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, two hundred two".