82103430121 has 2 divisors, whose sum is σ = 82103430122. Its totient is φ = 82103430120.

The previous prime is 82103430107. The next prime is 82103430133. The reversal of 82103430121 is 12103430128.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67893598096 + 14209832025 = 260564^2 + 119205^2 .

It is a cyclic number.

It is not a de Polignac number, because 82103430121 - 2⁵ = 82103430089 is a prime.

It is not a weakly prime, because it can be changed into another prime (82103430161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41051715060 + 41051715061.

It is an arithmetic number, because the mean of its divisors is an integer number (41051715061).

Almost surely, 2^82103430121 is an apocalyptic number.

It is an amenable number.

82103430121 is a deficient number, since it is larger than the sum of its proper divisors (1).

82103430121 is an equidigital number, since it uses as much as digits as its factorization.

82103430121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 82103430121 its reverse (12103430128), we get a palindrome (94206860249).

The spelling of 82103430121 in words is "eighty-two billion, one hundred three million, four hundred thirty thousand, one hundred twenty-one".