123030040421 has 4 divisors (see below), whose sum is σ = 123030993792. Its totient is φ = 123029087052.

The previous prime is 123030040361. The next prime is 123030040667. The reversal of 123030040421 is 124040030321.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 124040030321 = 421 ⋅294631901.

It is a cyclic number.

It is not a de Polignac number, because 123030040421 - 2²² = 123025846117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123030040393 and 123030040402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123030040321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245855 + ... + 553628.

It is an arithmetic number, because the mean of its divisors is an integer number (30757748448).

Almost surely, 2^123030040421 is an apocalyptic number.

It is an amenable number.

123030040421 is a deficient number, since it is larger than the sum of its proper divisors (953371).

123030040421 is an equidigital number, since it uses as much as digits as its factorization.

123030040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953370.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 123030040421 its reverse (124040030321), we get a palindrome (247070070742).

It can be divided in two parts, 1230300 and 40421, that added together give a palindrome (1270721).

The spelling of 123030040421 in words is "one hundred twenty-three billion, thirty million, forty thousand, four hundred twenty-one".