1121001112221 has 4 divisors (see below), whose sum is σ = 1494668149632. Its totient is φ = 747334074812.

The previous prime is 1121001112211. The next prime is 1121001112223. The reversal of 1121001112221 is 1222111001211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121001112221 - 2³⁹ = 571245298333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121001112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001112223) by changing a digit.

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, 186833518701 + ... + 186833518706.

It is an arithmetic number, because the mean of its divisors is an integer number (373667037408).

Almost surely, 2^{1121001112221} is an apocalyptic number.

It is an amenable number.

1121001112221 is a deficient number, since it is larger than the sum of its proper divisors (373667037411).

1121001112221 is an equidigital number, since it uses as much as digits as its factorization.

1121001112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373667037410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121001112221 its reverse (1222111001211), we get a palindrome (2343112113432).

The spelling of 1121001112221 in words is "one trillion, one hundred twenty-one billion, one million, one hundred twelve thousand, two hundred twenty-one".