2101201100123 has 4 divisors (see below), whose sum is σ = 2103321384768. Its totient is φ = 2099080815480.

The previous prime is 2101201100111. The next prime is 2101201100129. The reversal of 2101201100123 is 3210011021012.

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 2101201100123 - 2⁸ = 2101201099867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101201100098 and 2101201100107.

It is not an unprimeable number, because it can be changed into a prime (2101201100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060140836 + ... + 1060142817.

It is an arithmetic number, because the mean of its divisors is an integer number (525830346192).

Almost surely, 2^{2101201100123} is an apocalyptic number.

2101201100123 is a deficient number, since it is larger than the sum of its proper divisors (2120284645).

2101201100123 is an equidigital number, since it uses as much as digits as its factorization.

2101201100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120284644.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2101201100123 its reverse (3210011021012), we get a palindrome (5311212121135).

The spelling of 2101201100123 in words is "two trillion, one hundred one billion, two hundred one million, one hundred thousand, one hundred twenty-three".