213120123 has 8 divisors (see below), whose sum is σ = 284568336. Its totient is φ = 141876000.

The previous prime is 213120119. The next prime is 213120151. The reversal of 213120123 is 321021312.

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

It is not a de Polignac number, because 213120123 - 2² = 213120119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213120163) 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, 48568 + ... + 52773.

It is an arithmetic number, because the mean of its divisors is an integer number (35571042).

Almost surely, 2^213120123 is an apocalyptic number.

213120123 is a deficient number, since it is larger than the sum of its proper divisors (71448213).

213120123 is a wasteful number, since it uses less digits than its factorization.

213120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102045.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213120123 is about 14598.6342854392. The cubic root of 213120123 is about 597.3215078145.

Adding to 213120123 its reverse (321021312), we get a palindrome (534141435).

The spelling of 213120123 in words is "two hundred thirteen million, one hundred twenty thousand, one hundred twenty-three".