210203311223221 has 16 divisors (see below), whose sum is σ = 210466456200000. Its totient is φ = 209940395068800.

The previous prime is 210203311223219. The next prime is 210203311223263. The reversal of 210203311223221 is 122322113302012.

It is a cyclic number.

It is not a de Polignac number, because 210203311223221 - 2¹ = 210203311223219 is a prime.

It is a super-3 number, since 3×210203311223221³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210203311223201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18200990955 + ... + 18201002503.

It is an arithmetic number, because the mean of its divisors is an integer number (13154153512500).

Almost surely, 2^{210203311223221} is an apocalyptic number.

It is an amenable number.

210203311223221 is a deficient number, since it is larger than the sum of its proper divisors (263144976779).

210203311223221 is a wasteful number, since it uses less digits than its factorization.

210203311223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19620.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 210203311223221 its reverse (122322113302012), we get a palindrome (332525424525233).

The spelling of 210203311223221 in words is "two hundred ten trillion, two hundred three billion, three hundred eleven million, two hundred twenty-three thousand, two hundred twenty-one".