210203123221 has 16 divisors (see below), whose sum is σ = 269959866624. Its totient is φ = 159083489664.

The previous prime is 210203123213. The next prime is 210203123227. The reversal of 210203123221 is 122321302012.

It is a cyclic number.

It is not a de Polignac number, because 210203123221 - 2³ = 210203123213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210203123227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50213656 + ... + 50217841.

It is an arithmetic number, because the mean of its divisors is an integer number (16872491664).

Almost surely, 2^210203123221 is an apocalyptic number.

It is an amenable number.

210203123221 is a deficient number, since it is larger than the sum of its proper divisors (59756743403).

210203123221 is a wasteful number, since it uses less digits than its factorization.

210203123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100431540.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 210203123221 its reverse (122321302012), we get a palindrome (332524425233).

The spelling of 210203123221 in words is "two hundred ten billion, two hundred three million, one hundred twenty-three thousand, two hundred twenty-one".