167142212021 has 2 divisors, whose sum is σ = 167142212022. Its totient is φ = 167142212020.

The previous prime is 167142211981. The next prime is 167142212057. The reversal of 167142212021 is 120212241761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164218647121 + 2923564900 = 405239^2 + 54070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167142212021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167142212921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83571106010 + 83571106011.

It is an arithmetic number, because the mean of its divisors is an integer number (83571106011).

Almost surely, 2^167142212021 is an apocalyptic number.

It is an amenable number.

167142212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

167142212021 is an equidigital number, since it uses as much as digits as its factorization.

167142212021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 167142212021 its reverse (120212241761), we get a palindrome (287354453782).

The spelling of 167142212021 in words is "one hundred sixty-seven billion, one hundred forty-two million, two hundred twelve thousand, twenty-one".