123012621 has 8 divisors (see below), whose sum is σ = 182240960. Its totient is φ = 82008396.

The previous prime is 123012601. The next prime is 123012623. The reversal of 123012621 is 126210321.

123012621 is a `hidden beast` number, since 1 + 2 + 30 + 12 + 621 = 666.

It is not a de Polignac number, because 123012621 - 2¹⁰ = 123011597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123012594 and 123012603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012623) 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, 2277985 + ... + 2278038.

It is an arithmetic number, because the mean of its divisors is an integer number (22780120).

Almost surely, 2^123012621 is an apocalyptic number.

It is an amenable number.

123012621 is a deficient number, since it is larger than the sum of its proper divisors (59228339).

123012621 is an equidigital number, since it uses as much as digits as its factorization.

123012621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556032 (or 4556026 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 123012621 is about 11091.1054904369. The cubic root of 123012621 is about 497.3359926716.

Adding to 123012621 its reverse (126210321), we get a palindrome (249222942).

The spelling of 123012621 in words is "one hundred twenty-three million, twelve thousand, six hundred twenty-one".