1121202112221 has 12 divisors (see below), whose sum is σ = 1659014508060. Its totient is φ = 729237145920.

The previous prime is 1121202112213. The next prime is 1121202112223. The reversal of 1121202112221 is 1222112021211.

1121202112221 is a `hidden beast` number, since 112 + 120 + 211 + 2 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58993608996 + 1062208503225 = 242886^2 + 1030635^2 .

It is not a de Polignac number, because 1121202112221 - 2³ = 1121202112213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121202112194 and 1121202112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121202112223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1519243686 + ... + 1519244423.

It is an arithmetic number, because the mean of its divisors is an integer number (138251209005).

Almost surely, 2^{1121202112221} is an apocalyptic number.

It is an amenable number.

1121202112221 is a deficient number, since it is larger than the sum of its proper divisors (537812395839).

1121202112221 is a wasteful number, since it uses less digits than its factorization.

1121202112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038488156 (or 3038488153 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121202112221 its reverse (1222112021211), we get a palindrome (2343314133432).

The spelling of 1121202112221 in words is "one trillion, one hundred twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred twenty-one".