4243212123 has 16 divisors (see below), whose sum is σ = 5785136640. Its totient is φ = 2765196896.

The previous prime is 4243212097. The next prime is 4243212161. The reversal of 4243212123 is 3212123424.

It is a happy number.

It is not a de Polignac number, because 4243212123 - 2⁸ = 4243211867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4243212093 and 4243212102.

It is not an unprimeable number, because it can be changed into a prime (4243210123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98413 + ... + 134801.

It is an arithmetic number, because the mean of its divisors is an integer number (361571040).

Almost surely, 2^4243212123 is an apocalyptic number.

4243212123 is a deficient number, since it is larger than the sum of its proper divisors (1541924517).

4243212123 is a wasteful number, since it uses less digits than its factorization.

4243212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37266.

The product of its digits is 2304, while the sum is 24.

The square root of 4243212123 is about 65139.9426082031. The cubic root of 4243212123 is about 1618.9430847967.

Adding to 4243212123 its reverse (3212123424), we get a palindrome (7455335547).

The spelling of 4243212123 in words is "four billion, two hundred forty-three million, two hundred twelve thousand, one hundred twenty-three".