123121330 has 16 divisors (see below), whose sum is σ = 233282880. Its totient is φ = 46656432.

The previous prime is 123121309. The next prime is 123121333. The reversal of 123121330 is 33121321.

It is not an unprimeable number, because it can be changed into a prime (123121333) 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, 323814 + ... + 324193.

It is an arithmetic number, because the mean of its divisors is an integer number (14580180).

Almost surely, 2^123121330 is an apocalyptic number.

123121330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123121330 is a deficient number, since it is larger than the sum of its proper divisors (110161550).

123121330 is a wasteful number, since it uses less digits than its factorization.

123121330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648033.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 123121330 is about 11096.0051369851. The cubic root of 123121330 is about 497.4824518444.

Adding to 123121330 its reverse (33121321), we get a palindrome (156242651).

Subtracting from 123121330 its reverse (33121321), we obtain a palindrome (90000009).

The spelling of 123121330 in words is "one hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty".