103123321030021 has 2 divisors, whose sum is σ = 103123321030022. Its totient is φ = 103123321030020.

The previous prime is 103123321030007. The next prime is 103123321030061. The reversal of 103123321030021 is 120030123321301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69860995007521 + 33262326022500 = 8358289^2 + 5767350^2 .

It is a cyclic number.

It is not a de Polignac number, because 103123321030021 - 2⁷ = 103123321029893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103123321029974 and 103123321030001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103123321030061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51561660515010 + 51561660515011.

It is an arithmetic number, because the mean of its divisors is an integer number (51561660515011).

Almost surely, 2^{103123321030021} is an apocalyptic number.

It is an amenable number.

103123321030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

103123321030021 is an equidigital number, since it uses as much as digits as its factorization.

103123321030021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 103123321030021 its reverse (120030123321301), we get a palindrome (223153444351322).

The spelling of 103123321030021 in words is "one hundred three trillion, one hundred twenty-three billion, three hundred twenty-one million, thirty thousand, twenty-one".