123124221 has 36 divisors (see below), whose sum is σ = 202902336. Its totient is φ = 71346000.

The previous prime is 123124207. The next prime is 123124223. The reversal of 123124221 is 122421321.

It is a happy number.

It is not a de Polignac number, because 123124221 - 2⁹ = 123123709 is a prime.

It is a super-4 number, since 4×123124221⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123124194 and 123124203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123124223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51196 + ... + 53546.

It is an arithmetic number, because the mean of its divisors is an integer number (5636176).

Almost surely, 2^123124221 is an apocalyptic number.

123124221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123124221 is a deficient number, since it is larger than the sum of its proper divisors (79778115).

123124221 is a wasteful number, since it uses less digits than its factorization.

123124221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414 (or 2388 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 123124221 is about 11096.1354083302. The cubic root of 123124221 is about 497.4863455929.

Adding to 123124221 its reverse (122421321), we get a palindrome (245545542).

It can be divided in two parts, 1231 and 24221, that added together give a palindrome (25452).

The spelling of 123124221 in words is "one hundred twenty-three million, one hundred twenty-four thousand, two hundred twenty-one".