123013221 has 8 divisors (see below), whose sum is σ = 165994080. Its totient is φ = 81020592.

The previous prime is 123013217. The next prime is 123013237. The reversal of 123013221 is 122310321.

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

It is not a de Polignac number, because 123013221 - 2² = 123013217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013321) 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, 246766 + ... + 247263.

It is an arithmetic number, because the mean of its divisors is an integer number (20749260).

Almost surely, 2^123013221 is an apocalyptic number.

It is an amenable number.

123013221 is a deficient number, since it is larger than the sum of its proper divisors (42980859).

123013221 is an equidigital number, since it uses as much as digits as its factorization.

123013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494115.

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

The square root of 123013221 is about 11091.1325391053. The cubic root of 123013221 is about 497.3368012638.

Adding to 123013221 its reverse (122310321), we get a palindrome (245323542).

The spelling of 123013221 in words is "one hundred twenty-three million, thirteen thousand, two hundred twenty-one".