210394584921 has 16 divisors (see below), whose sum is σ = 288121720064. Its totient is φ = 136465617024.

The previous prime is 210394584899. The next prime is 210394584941. The reversal of 210394584921 is 129485493012.

It is a happy number.

It is not a de Polignac number, because 210394584921 - 2¹³ = 210394576729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210394584941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564576 + ... + 3623118.

It is an arithmetic number, because the mean of its divisors is an integer number (18007607504).

Almost surely, 2^210394584921 is an apocalyptic number.

It is an amenable number.

210394584921 is a deficient number, since it is larger than the sum of its proper divisors (77727135143).

210394584921 is a wasteful number, since it uses less digits than its factorization.

210394584921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90960.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 210394584921 in words is "two hundred ten billion, three hundred ninety-four million, five hundred eighty-four thousand, nine hundred twenty-one".