167215121 has 2 divisors, whose sum is σ = 167215122. Its totient is φ = 167215120.

The previous prime is 167215117. The next prime is 167215133. The reversal of 167215121 is 121512761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160376896 + 6838225 = 12664^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 167215121 - 2² = 167215117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (167215171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83607560 + 83607561.

It is an arithmetic number, because the mean of its divisors is an integer number (83607561).

Almost surely, 2^167215121 is an apocalyptic number.

It is an amenable number.

167215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

167215121 is an equidigital number, since it uses as much as digits as its factorization.

167215121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 26.

The square root of 167215121 is about 12931.1685860173. The cubic root of 167215121 is about 550.9241993084.

Adding to 167215121 its reverse (121512761), we get a palindrome (288727882).

It can be divided in two parts, 16721 and 5121, that multiplied together give a triangular number (85628241 = T₁₃₀₈₆).

The spelling of 167215121 in words is "one hundred sixty-seven million, two hundred fifteen thousand, one hundred twenty-one".