213254230921 has 2 divisors, whose sum is σ = 213254230922. Its totient is φ = 213254230920.

The previous prime is 213254230913. The next prime is 213254230927. The reversal of 213254230921 is 129032452312.

213254230921 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., 210874742521 + 2379488400 = 459211^2 + 48780^2 .

It is a cyclic number.

It is not a de Polignac number, because 213254230921 - 2³ = 213254230913 is a prime.

It is not a weakly prime, because it can be changed into another prime (213254230927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106627115460 + 106627115461.

It is an arithmetic number, because the mean of its divisors is an integer number (106627115461).

Almost surely, 2^213254230921 is an apocalyptic number.

It is an amenable number.

213254230921 is a deficient number, since it is larger than the sum of its proper divisors (1).

213254230921 is an equidigital number, since it uses as much as digits as its factorization.

213254230921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 213254230921 in words is "two hundred thirteen billion, two hundred fifty-four million, two hundred thirty thousand, nine hundred twenty-one".