30213203123 has 4 divisors (see below), whose sum is σ = 30856037280. Its totient is φ = 29570368968.

The previous prime is 30213203101. The next prime is 30213203129. The reversal of 30213203123 is 32130231203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30213203123 - 2¹⁰ = 30213202099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30213203095 and 30213203104.

It is not an unprimeable number, because it can be changed into a prime (30213203129) 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 3 ways as a sum of consecutive naturals, for example, 321417008 + ... + 321417101.

It is an arithmetic number, because the mean of its divisors is an integer number (7714009320).

Almost surely, 2^30213203123 is an apocalyptic number.

30213203123 is a deficient number, since it is larger than the sum of its proper divisors (642834157).

30213203123 is an equidigital number, since it uses as much as digits as its factorization.

30213203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642834156.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 30213203123 its reverse (32130231203), we get a palindrome (62343434326).

The spelling of 30213203123 in words is "thirty billion, two hundred thirteen million, two hundred three thousand, one hundred twenty-three".