213045121 has 2 divisors, whose sum is σ = 213045122. Its totient is φ = 213045120.

The previous prime is 213045103. The next prime is 213045127. The reversal of 213045121 is 121540312.

213045121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197796096 + 15249025 = 14064^2 + 3905^2 .

It is a cyclic number.

It is not a de Polignac number, because 213045121 - 2⁹ = 213044609 is a prime.

It is not a weakly prime, because it can be changed into another prime (213045127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106522560 + 106522561.

It is an arithmetic number, because the mean of its divisors is an integer number (106522561).

Almost surely, 2^213045121 is an apocalyptic number.

It is an amenable number.

213045121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213045121 is an equidigital number, since it uses as much as digits as its factorization.

213045121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 213045121 is about 14596.0652574589. The cubic root of 213045121 is about 597.2514290821.

Adding to 213045121 its reverse (121540312), we get a palindrome (334585433).

The spelling of 213045121 in words is "two hundred thirteen million, forty-five thousand, one hundred twenty-one".