82658236121 has 2 divisors, whose sum is σ = 82658236122. Its totient is φ = 82658236120.

The previous prime is 82658236049. The next prime is 82658236189. The reversal of 82658236121 is 12163285628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51956187721 + 30702048400 = 227939^2 + 175220^2 .

It is a cyclic number.

It is not a de Polignac number, because 82658236121 - 2¹⁰ = 82658235097 is a prime.

It is not a weakly prime, because it can be changed into another prime (82658236021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41329118060 + 41329118061.

It is an arithmetic number, because the mean of its divisors is an integer number (41329118061).

Almost surely, 2^82658236121 is an apocalyptic number.

It is an amenable number.

82658236121 is a deficient number, since it is larger than the sum of its proper divisors (1).

82658236121 is an equidigital number, since it uses as much as digits as its factorization.

82658236121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The spelling of 82658236121 in words is "eighty-two billion, six hundred fifty-eight million, two hundred thirty-six thousand, one hundred twenty-one".