210123030221 has 8 divisors (see below), whose sum is σ = 226632882840. Its totient is φ = 193662683712.

The previous prime is 210123030217. The next prime is 210123030253. The reversal of 210123030221 is 122030321012.

It can be written as a sum of positive squares in 4 ways, for example, as 38225724196 + 171897306025 = 195514^2 + 414605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210123030221 - 2² = 210123030217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210123030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210123030211) 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 7 ways as a sum of consecutive naturals, for example, 12367706 + ... + 12384683.

It is an arithmetic number, because the mean of its divisors is an integer number (28329110355).

Almost surely, 2^210123030221 is an apocalyptic number.

It is an amenable number.

210123030221 is a deficient number, since it is larger than the sum of its proper divisors (16509852619).

210123030221 is a wasteful number, since it uses less digits than its factorization.

210123030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24753055.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 210123030221 its reverse (122030321012), we get a palindrome (332153351233).

The spelling of 210123030221 in words is "two hundred ten billion, one hundred twenty-three million, thirty thousand, two hundred twenty-one".