123030312421 has 2 divisors, whose sum is σ = 123030312422. Its totient is φ = 123030312420.

The previous prime is 123030312403. The next prime is 123030312469. The reversal of 123030312421 is 124213030321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120765980196 + 2264332225 = 347514^2 + 47585^2 .

It is an emirp because it is prime and its reverse (124213030321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123030312421 - 2⁵ = 123030312389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123030312392 and 123030312401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123030312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515156210 + 61515156211.

It is an arithmetic number, because the mean of its divisors is an integer number (61515156211).

Almost surely, 2^123030312421 is an apocalyptic number.

It is an amenable number.

123030312421 is a deficient number, since it is larger than the sum of its proper divisors (1).

123030312421 is an equidigital number, since it uses as much as digits as its factorization.

123030312421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123030312421 its reverse (124213030321), we get a palindrome (247243342742).

The spelling of 123030312421 in words is "one hundred twenty-three billion, thirty million, three hundred twelve thousand, four hundred twenty-one".