1100333121221 has 4 divisors (see below), whose sum is σ = 1118982835200. Its totient is φ = 1081683407244.

The previous prime is 1100333121157. The next prime is 1100333121253. The reversal of 1100333121221 is 1221213330011.

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 1100333121221 - 2⁶ = 1100333121157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1100333121193 and 1100333121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100333121421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9324856901 + ... + 9324857018.

It is an arithmetic number, because the mean of its divisors is an integer number (279745708800).

Almost surely, 2^{1100333121221} is an apocalyptic number.

It is an amenable number.

1100333121221 is a deficient number, since it is larger than the sum of its proper divisors (18649713979).

1100333121221 is an equidigital number, since it uses as much as digits as its factorization.

1100333121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18649713978.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1100333121221 its reverse (1221213330011), we get a palindrome (2321546451232).

The spelling of 1100333121221 in words is "one trillion, one hundred billion, three hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty-one".