1100123331221 has 4 divisors (see below), whose sum is σ = 1158024559200. Its totient is φ = 1042222103244.

The previous prime is 1100123331199. The next prime is 1100123331269. The reversal of 1100123331221 is 1221333210011.

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 1100123331221 - 2⁶ = 1100123331157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100123331193 and 1100123331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100123331521) 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, 28950613961 + ... + 28950613998.

It is an arithmetic number, because the mean of its divisors is an integer number (289506139800).

Almost surely, 2^{1100123331221} is an apocalyptic number.

It is an amenable number.

1100123331221 is a deficient number, since it is larger than the sum of its proper divisors (57901227979).

1100123331221 is an equidigital number, since it uses as much as digits as its factorization.

1100123331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57901227978.

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

Adding to 1100123331221 its reverse (1221333210011), we get a palindrome (2321456541232).

The spelling of 1100123331221 in words is "one trillion, one hundred billion, one hundred twenty-three million, three hundred thirty-one thousand, two hundred twenty-one".