210002202221 has 12 divisors (see below), whose sum is σ = 252712011420. Its totient is φ = 173794924800.

The previous prime is 210002202217. The next prime is 210002202269. The reversal of 210002202221 is 122202200012.

It can be written as a sum of positive squares in 2 ways, for example, as 76878652900 + 133123549321 = 277270^2 + 364861^2 .

It is not a de Polignac number, because 210002202221 - 2² = 210002202217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210002202196 and 210002202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002202821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73890980 + ... + 73893821.

It is an arithmetic number, because the mean of its divisors is an integer number (21059334285).

Almost surely, 2^210002202221 is an apocalyptic number.

It is an amenable number.

210002202221 is a deficient number, since it is larger than the sum of its proper divisors (42709809199).

210002202221 is a wasteful number, since it uses less digits than its factorization.

210002202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147784844 (or 147784837 counting only the distinct ones).

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

Adding to 210002202221 its reverse (122202200012), we get a palindrome (332204402233).

The spelling of 210002202221 in words is "two hundred ten billion, two million, two hundred two thousand, two hundred twenty-one".