210202200221 has 4 divisors (see below), whose sum is σ = 226371600252. Its totient is φ = 194032800192.

The previous prime is 210202200193. The next prime is 210202200259. The reversal of 210202200221 is 122002202012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69566700025 + 140635500196 = 263755^2 + 375014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210202200221 is a prime.

It is a super-3 number, since 3×210202200221³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210202200196 and 210202200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202200521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8084699996 + ... + 8084700021.

It is an arithmetic number, because the mean of its divisors is an integer number (56592900063).

Almost surely, 2^210202200221 is an apocalyptic number.

It is an amenable number.

210202200221 is a deficient number, since it is larger than the sum of its proper divisors (16169400031).

210202200221 is a wasteful number, since it uses less digits than its factorization.

210202200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16169400030.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 210202200221 its reverse (122002202012), we get a palindrome (332204402233).

The spelling of 210202200221 in words is "two hundred ten billion, two hundred two million, two hundred thousand, two hundred twenty-one".