2421212123 has 8 divisors (see below), whose sum is σ = 2780339520. Its totient is φ = 2085254280.

The previous prime is 2421212119. The next prime is 2421212153. The reversal of 2421212123 is 3212121242.

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 2421212123 - 2² = 2421212119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421212095 and 2421212104.

It is not an unprimeable number, because it can be changed into a prime (2421212113) 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, 5792165 + ... + 5792582.

It is an arithmetic number, because the mean of its divisors is an integer number (347542440).

Almost surely, 2^2421212123 is an apocalyptic number.

2421212123 is a deficient number, since it is larger than the sum of its proper divisors (359127397).

2421212123 is a wasteful number, since it uses less digits than its factorization.

2421212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11584777.

The product of its digits is 384, while the sum is 20.

The square root of 2421212123 is about 49205.8139146179. The cubic root of 2421212123 is about 1342.7988065525.

Adding to 2421212123 its reverse (3212121242), we get a palindrome (5633333365).

The spelling of 2421212123 in words is "two billion, four hundred twenty-one million, two hundred twelve thousand, one hundred twenty-three".