213094121 has 2 divisors, whose sum is σ = 213094122. Its totient is φ = 213094120.

The previous prime is 213094087. The next prime is 213094127. The reversal of 213094121 is 121490312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176358400 + 36735721 = 13280^2 + 6061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213094121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213094127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106547060 + 106547061.

It is an arithmetic number, because the mean of its divisors is an integer number (106547061).

Almost surely, 2^213094121 is an apocalyptic number.

It is an amenable number.

213094121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213094121 is an equidigital number, since it uses as much as digits as its factorization.

213094121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 213094121 is about 14597.7436955168. The cubic root of 213094121 is about 597.2972144953.

The spelling of 213094121 in words is "two hundred thirteen million, ninety-four thousand, one hundred twenty-one".