213121067 has 2 divisors, whose sum is σ = 213121068. Its totient is φ = 213121066.

The previous prime is 213121057. The next prime is 213121079. The reversal of 213121067 is 760121312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213121067 - 2⁸ = 213120811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213121057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560533 + 106560534.

It is an arithmetic number, because the mean of its divisors is an integer number (106560534).

Almost surely, 2^213121067 is an apocalyptic number.

213121067 is a deficient number, since it is larger than the sum of its proper divisors (1).

213121067 is an equidigital number, since it uses as much as digits as its factorization.

213121067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 213121067 is about 14598.6666171949. Note that the first 4 decimals coincide. The cubic root of 213121067 is about 597.3223897438.

Adding to 213121067 its reverse (760121312), we get a palindrome (973242379).

The spelling of 213121067 in words is "two hundred thirteen million, one hundred twenty-one thousand, sixty-seven".