213120420232123 has 8 divisors (see below), whose sum is σ = 213187470374736. Its totient is φ = 213053379645600.

The previous prime is 213120420232037. The next prime is 213120420232133. The reversal of 213120420232123 is 321232024021312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213120420232123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213120420232091 and 213120420232100.

It is not an unprimeable number, because it can be changed into a prime (213120420232133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42353793 + ... + 47117773.

It is an arithmetic number, because the mean of its divisors is an integer number (26648433796842).

Almost surely, 2^{213120420232123} is an apocalyptic number.

213120420232123 is a deficient number, since it is larger than the sum of its proper divisors (67050142613).

213120420232123 is an equidigital number, since it uses as much as digits as its factorization.

213120420232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778045.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 213120420232123 its reverse (321232024021312), we get a palindrome (534352444253435).

The spelling of 213120420232123 in words is "two hundred thirteen trillion, one hundred twenty billion, four hundred twenty million, two hundred thirty-two thousand, one hundred twenty-three".