2123040121 has 8 divisors (see below), whose sum is σ = 2251337544. Its totient is φ = 1995121920.

The previous prime is 2123040119. The next prime is 2123040137. The reversal of 2123040121 is 1210403212.

It can be written as a sum of positive squares in 4 ways, for example, as 1508545600 + 614494521 = 38840^2 + 24789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123040121 - 2¹ = 2123040119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123040095 and 2123040104.

It is not an unprimeable number, because it can be changed into a prime (2123040191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83230 + ... + 105703.

It is an arithmetic number, because the mean of its divisors is an integer number (281417193).

Almost surely, 2^2123040121 is an apocalyptic number.

It is an amenable number.

2123040121 is a deficient number, since it is larger than the sum of its proper divisors (128297423).

2123040121 is a wasteful number, since it uses less digits than its factorization.

2123040121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189611.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2123040121 is about 46076.4595102532. The cubic root of 2123040121 is about 1285.2454266342.

Adding to 2123040121 its reverse (1210403212), we get a palindrome (3333443333).

The spelling of 2123040121 in words is "two billion, one hundred twenty-three million, forty thousand, one hundred twenty-one".