164384500121 has 2 divisors, whose sum is σ = 164384500122. Its totient is φ = 164384500120.

The previous prime is 164384500061. The next prime is 164384500127. The reversal of 164384500121 is 121005483461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127120058521 + 37264441600 = 356539^2 + 193040^2 .

It is an emirp because it is prime and its reverse (121005483461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164384500121 - 2¹⁸ = 164384237977 is a prime.

It is not a weakly prime, because it can be changed into another prime (164384500127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82192250060 + 82192250061.

It is an arithmetic number, because the mean of its divisors is an integer number (82192250061).

Almost surely, 2^164384500121 is an apocalyptic number.

It is an amenable number.

164384500121 is a deficient number, since it is larger than the sum of its proper divisors (1).

164384500121 is an equidigital number, since it uses as much as digits as its factorization.

164384500121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 164384500121 its reverse (121005483461), we get a palindrome (285389983582).

The spelling of 164384500121 in words is "one hundred sixty-four billion, three hundred eighty-four million, five hundred thousand, one hundred twenty-one".