2103021112123 has 4 divisors (see below), whose sum is σ = 2103025816840. Its totient is φ = 2103016407408.

The previous prime is 2103021112099. The next prime is 2103021112187. The reversal of 2103021112123 is 3212111203012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2103021112123 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 2103021112123.

It is not an unprimeable number, because it can be changed into a prime (2103021712123) 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, 1602090 + ... + 2602447.

It is an arithmetic number, because the mean of its divisors is an integer number (525756454210).

Almost surely, 2^{2103021112123} is an apocalyptic number.

2103021112123 is a deficient number, since it is larger than the sum of its proper divisors (4704717).

2103021112123 is an equidigital number, since it uses as much as digits as its factorization.

2103021112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704716.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2103021112123 its reverse (3212111203012), we get a palindrome (5315132315135).

The spelling of 2103021112123 in words is "two trillion, one hundred three billion, twenty-one million, one hundred twelve thousand, one hundred twenty-three".