82241890121 has 2 divisors, whose sum is σ = 82241890122. Its totient is φ = 82241890120.

The previous prime is 82241890117. The next prime is 82241890261. The reversal of 82241890121 is 12109814228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63728478025 + 18513412096 = 252445^2 + 136064^2 .

It is a cyclic number.

It is not a de Polignac number, because 82241890121 - 2² = 82241890117 is a prime.

It is not a weakly prime, because it can be changed into another prime (82241892121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41120945060 + 41120945061.

It is an arithmetic number, because the mean of its divisors is an integer number (41120945061).

Almost surely, 2^82241890121 is an apocalyptic number.

It is an amenable number.

82241890121 is a deficient number, since it is larger than the sum of its proper divisors (1).

82241890121 is an equidigital number, since it uses as much as digits as its factorization.

82241890121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 82241890121 in words is "eighty-two billion, two hundred forty-one million, eight hundred ninety thousand, one hundred twenty-one".