167211221201 has 2 divisors, whose sum is σ = 167211221202. Its totient is φ = 167211221200.

The previous prime is 167211221173. The next prime is 167211221251. The reversal of 167211221201 is 102122112761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154292625601 + 12918595600 = 392801^2 + 113660^2 .

It is an emirp because it is prime and its reverse (102122112761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167211221201 - 2¹⁸ = 167210959057 is a prime.

It is not a weakly prime, because it can be changed into another prime (167211221251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83605610600 + 83605610601.

It is an arithmetic number, because the mean of its divisors is an integer number (83605610601).

Almost surely, 2^167211221201 is an apocalyptic number.

It is an amenable number.

167211221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

167211221201 is an equidigital number, since it uses as much as digits as its factorization.

167211221201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 167211221201 its reverse (102122112761), we get a palindrome (269333333962).

The spelling of 167211221201 in words is "one hundred sixty-seven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred one".