213120320123 has 4 divisors (see below), whose sum is σ = 225656809560. Its totient is φ = 200583830688.

The previous prime is 213120320117. The next prime is 213120320129. The reversal of 213120320123 is 321023021312.

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

It is an interprime number because it is at equal distance from previous prime (213120320117) and next prime (213120320129).

It is not a de Polignac number, because 213120320123 - 2¹² = 213120316027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213120320095 and 213120320104.

It is not an unprimeable number, because it can be changed into a prime (213120320129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6268244693 + ... + 6268244726.

It is an arithmetic number, because the mean of its divisors is an integer number (56414202390).

Almost surely, 2^213120320123 is an apocalyptic number.

213120320123 is a deficient number, since it is larger than the sum of its proper divisors (12536489437).

213120320123 is a wasteful number, since it uses less digits than its factorization.

213120320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12536489436.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213120320123 its reverse (321023021312), we get a palindrome (534143341435).

The spelling of 213120320123 in words is "two hundred thirteen billion, one hundred twenty million, three hundred twenty thousand, one hundred twenty-three".