123030142285621 has 2 divisors, whose sum is σ = 123030142285622. Its totient is φ = 123030142285620.

The previous prime is 123030142285597. The next prime is 123030142285657. The reversal of 123030142285621 is 126582241030321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89168624811396 + 33861517474225 = 9442914^2 + 5819065^2 .

It is a cyclic number.

It is not a de Polignac number, because 123030142285621 - 2⁹ = 123030142285109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123030142285121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61515071142810 + 61515071142811.

It is an arithmetic number, because the mean of its divisors is an integer number (61515071142811).

Almost surely, 2^{123030142285621} is an apocalyptic number.

It is an amenable number.

123030142285621 is a deficient number, since it is larger than the sum of its proper divisors (1).

123030142285621 is an equidigital number, since it uses as much as digits as its factorization.

123030142285621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 123030142285621 in words is "one hundred twenty-three trillion, thirty billion, one hundred forty-two million, two hundred eighty-five thousand, six hundred twenty-one".