123441021 has 12 divisors (see below), whose sum is σ = 194513280. Its totient is φ = 74812680.

The previous prime is 123441013. The next prime is 123441053. The reversal of 123441021 is 120144321.

123441021 is a `hidden beast` number, since 1 + 234 + 410 + 21 = 666.

It is not a de Polignac number, because 123441021 - 2³ = 123441013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123440985 and 123441003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123441091) 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 11 ways as a sum of consecutive naturals, for example, 623341 + ... + 623538.

It is an arithmetic number, because the mean of its divisors is an integer number (16209440).

Almost surely, 2^123441021 is an apocalyptic number.

123441021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123441021 is a deficient number, since it is larger than the sum of its proper divisors (71072259).

123441021 is a wasteful number, since it uses less digits than its factorization.

123441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246896 (or 1246893 counting only the distinct ones).

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

The square root of 123441021 is about 11110.4014778945. The cubic root of 123441021 is about 497.9126594785.

Adding to 123441021 its reverse (120144321), we get a palindrome (243585342).

It can be divided in two parts, 123 and 441021, that added together give a palindrome (441144).

The spelling of 123441021 in words is "one hundred twenty-three million, four hundred forty-one thousand, twenty-one".