2100133203123 has 4 divisors (see below), whose sum is σ = 2800177604168. Its totient is φ = 1400088802080.

The previous prime is 2100133203089. The next prime is 2100133203127. The reversal of 2100133203123 is 3213023310012.

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

It is not a de Polignac number, because 2100133203123 - 2³³ = 2091543268531 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 2100133203123.

It is not an unprimeable number, because it can be changed into a prime (2100133203127) 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, 350022200518 + ... + 350022200523.

It is an arithmetic number, because the mean of its divisors is an integer number (700044401042).

Almost surely, 2^{2100133203123} is an apocalyptic number.

2100133203123 is a deficient number, since it is larger than the sum of its proper divisors (700044401045).

2100133203123 is an equidigital number, since it uses as much as digits as its factorization.

2100133203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700044401044.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 2100133203123 its reverse (3213023310012), we get a palindrome (5313156513135).

The spelling of 2100133203123 in words is "two trillion, one hundred billion, one hundred thirty-three million, two hundred three thousand, one hundred twenty-three".