82440984121 has 2 divisors, whose sum is σ = 82440984122. Its totient is φ = 82440984120.

The previous prime is 82440984079. The next prime is 82440984139. The reversal of 82440984121 is 12148904428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82404017721 + 36966400 = 287061^2 + 6080^2 .

It is a cyclic number.

It is not a de Polignac number, because 82440984121 - 2¹⁷ = 82440853049 is a prime.

It is not a weakly prime, because it can be changed into another prime (82440984161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41220492060 + 41220492061.

It is an arithmetic number, because the mean of its divisors is an integer number (41220492061).

Almost surely, 2^82440984121 is an apocalyptic number.

It is an amenable number.

82440984121 is a deficient number, since it is larger than the sum of its proper divisors (1).

82440984121 is an equidigital number, since it uses as much as digits as its factorization.

82440984121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 82440984121 in words is "eighty-two billion, four hundred forty million, nine hundred eighty-four thousand, one hundred twenty-one".