1100110001221 has 32 divisors (see below), whose sum is σ = 1453380185088. Its totient is φ = 806173290240.

The previous prime is 1100110001213. The next prime is 1100110001273. The reversal of 1100110001221 is 1221000110011.

It is a cyclic number.

It is not a de Polignac number, because 1100110001221 - 2³ = 1100110001213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100110001198 and 1100110001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100110001321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1351926 + ... + 2006968.

It is an arithmetic number, because the mean of its divisors is an integer number (45418130784).

Almost surely, 2^{1100110001221} is an apocalyptic number.

1100110001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100110001221 is a deficient number, since it is larger than the sum of its proper divisors (353270183867).

1100110001221 is a wasteful number, since it uses less digits than its factorization.

1100110001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656361.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1100110001221 its reverse (1221000110011), we get a palindrome (2321110111232).

The spelling of 1100110001221 in words is "one trillion, one hundred billion, one hundred ten million, one thousand, two hundred twenty-one".