1121102001221 has 4 divisors (see below), whose sum is σ = 1122158648844. Its totient is φ = 1120045353600.

The previous prime is 1121102001179. The next prime is 1121102001287. The reversal of 1121102001221 is 1221002011211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 776709078721 + 344392922500 = 881311^2 + 586850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121102001221 - 2¹⁰ = 1121102000197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121102001196 and 1121102001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121102004221) 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, 528322220 + ... + 528324341.

It is an arithmetic number, because the mean of its divisors is an integer number (280539662211).

Almost surely, 2^{1121102001221} is an apocalyptic number.

It is an amenable number.

1121102001221 is a deficient number, since it is larger than the sum of its proper divisors (1056647623).

1121102001221 is a wasteful number, since it uses less digits than its factorization.

1121102001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056647622.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121102001221 its reverse (1221002011211), we get a palindrome (2342104012432).

The spelling of 1121102001221 in words is "one trillion, one hundred twenty-one billion, one hundred two million, one thousand, two hundred twenty-one".