123102302021 has 2 divisors, whose sum is σ = 123102302022. Its totient is φ = 123102302020.

The previous prime is 123102301963. The next prime is 123102302041. The reversal of 123102302021 is 120203201321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115318651396 + 7783650625 = 339586^2 + 88225^2 .

It is a cyclic number.

It is not a de Polignac number, because 123102302021 - 2⁶ = 123102301957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123102302041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61551151010 + 61551151011.

It is an arithmetic number, because the mean of its divisors is an integer number (61551151011).

Almost surely, 2^123102302021 is an apocalyptic number.

It is an amenable number.

123102302021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123102302021 is an equidigital number, since it uses as much as digits as its factorization.

123102302021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123102302021 its reverse (120203201321), we get a palindrome (243305503342).

The spelling of 123102302021 in words is "one hundred twenty-three billion, one hundred two million, three hundred two thousand, twenty-one".