2121000312123 has 48 divisors (see below), whose sum is σ = 3819875155200. Its totient is φ = 1101749624640.

The previous prime is 2121000312077. The next prime is 2121000312127. The reversal of 2121000312123 is 3212130001212.

2121000312123 is a `hidden beast` number, since 21 + 210 + 0 + 0 + 312 + 123 = 666.

It is not a de Polignac number, because 2121000312123 - 2⁹ = 2121000311611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121000312096 and 2121000312105.

It is not an unprimeable number, because it can be changed into a prime (2121000312127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12158008 + ... + 12331226.

It is an arithmetic number, because the mean of its divisors is an integer number (79580732400).

Almost surely, 2^{2121000312123} is an apocalyptic number.

2121000312123 is a deficient number, since it is larger than the sum of its proper divisors (1698874843077).

2121000312123 is a wasteful number, since it uses less digits than its factorization.

2121000312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190912 (or 190909 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2121000312123 its reverse (3212130001212), we get a palindrome (5333130313335).

The spelling of 2121000312123 in words is "two trillion, one hundred twenty-one billion, three hundred twelve thousand, one hundred twenty-three".