123052405621 has 4 divisors (see below), whose sum is σ = 123346087200. Its totient is φ = 122758724044.

The previous prime is 123052405601. The next prime is 123052405627. The reversal of 123052405621 is 126504250321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123052405621 - 2⁹ = 123052405109 is a prime.

It is a super-2 number, since 2×123052405621² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123052405627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146840161 + ... + 146840998.

It is an arithmetic number, because the mean of its divisors is an integer number (30836521800).

Almost surely, 2^123052405621 is an apocalyptic number.

It is an amenable number.

123052405621 is a deficient number, since it is larger than the sum of its proper divisors (293681579).

123052405621 is an equidigital number, since it uses as much as digits as its factorization.

123052405621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293681578.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 123052405621 its reverse (126504250321), we get a palindrome (249556655942).

The spelling of 123052405621 in words is "one hundred twenty-three billion, fifty-two million, four hundred five thousand, six hundred twenty-one".