2121204023 has 8 divisors (see below), whose sum is σ = 2264296320. Its totient is φ = 1981256760.

The previous prime is 2121203999. The next prime is 2121204067. The reversal of 2121204023 is 3204021212.

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 2121204023 - 2⁸ = 2121203767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121203992 and 2121204010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784865 + ... + 787562.

It is an arithmetic number, because the mean of its divisors is an integer number (283037040).

Almost surely, 2^2121204023 is an apocalyptic number.

2121204023 is a deficient number, since it is larger than the sum of its proper divisors (143092297).

2121204023 is a wasteful number, since it uses less digits than its factorization.

2121204023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572517.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2121204023 is about 46056.5307312655. The cubic root of 2121204023 is about 1284.8748076089.

Adding to 2121204023 its reverse (3204021212), we get a palindrome (5325225235).

The spelling of 2121204023 in words is "two billion, one hundred twenty-one million, two hundred four thousand, twenty-three".