201021220220210 has 32 divisors (see below), whose sum is σ = 403108866019440. Its totient is φ = 71663798400768.

The previous prime is 201021220220207. The next prime is 201021220220243. The reversal of 201021220220210 is 12022022120102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 51649044972529 + 149372175247681 = 7186727^2 + 12221791^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26660635517 + ... + 26660643056.

Almost surely, 2^{201021220220210} is an apocalyptic number.

201021220220210 is an abundant number, since it is smaller than the sum of its proper divisors (202087645799230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201021220220210 is a wasteful number, since it uses less digits than its factorization.

201021220220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53321278622.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201021220220210 its reverse (12022022120102), we get a palindrome (213043242340312).

The spelling of 201021220220210 in words is "two hundred one trillion, twenty-one billion, two hundred twenty million, two hundred twenty thousand, two hundred ten".