210020200221 has 16 divisors (see below), whose sum is σ = 301745687936. Its totient is φ = 129166819776.

The previous prime is 210020200217. The next prime is 210020200241. The reversal of 210020200221 is 122002020012.

It is not a de Polignac number, because 210020200221 - 2² = 210020200217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210020200197 and 210020200206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020200241) 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, 1524385 + ... + 1656438.

It is an arithmetic number, because the mean of its divisors is an integer number (18859105496).

Almost surely, 2^210020200221 is an apocalyptic number.

It is an amenable number.

210020200221 is a deficient number, since it is larger than the sum of its proper divisors (91725487715).

210020200221 is a wasteful number, since it uses less digits than its factorization.

210020200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182532.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 210020200221 its reverse (122002020012), we get a palindrome (332022220233).

The spelling of 210020200221 in words is "two hundred ten billion, twenty million, two hundred thousand, two hundred twenty-one".