1100205220123 has 4 divisors (see below), whose sum is σ = 1100399642680. Its totient is φ = 1100010797568.

The previous prime is 1100205220111. The next prime is 1100205220207. The reversal of 1100205220123 is 3210225020011.

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

It is a cyclic number.

It is not a de Polignac number, because 1100205220123 - 2⁹ = 1100205219611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100205220123.

It is not an unprimeable number, because it can be changed into a prime (1100205230123) 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, 97202790 + ... + 97214107.

It is an arithmetic number, because the mean of its divisors is an integer number (275099910670).

Almost surely, 2^{1100205220123} is an apocalyptic number.

1100205220123 is a deficient number, since it is larger than the sum of its proper divisors (194422557).

1100205220123 is an equidigital number, since it uses as much as digits as its factorization.

1100205220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194422556.

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 1100205220123 in words is "one trillion, one hundred billion, two hundred five million, two hundred twenty thousand, one hundred twenty-three".