201021211212210 has 96 divisors (see below), whose sum is σ = 554967275344560. Its totient is φ = 50309457690624.

The previous prime is 201021211212181. The next prime is 201021211212233. The reversal of 201021211212210 is 12212112120102.

201021211212210 is a `hidden beast` number, since 2 + 0 + 10 + 21 + 211 + 212 + 210 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 85654858410081 + 115366352802129 = 9254991^2 + 10740873^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185559645 + ... + 186639824.

Almost surely, 2^{201021211212210} is an apocalyptic number.

201021211212210 is an abundant number, since it is smaller than the sum of its proper divisors (353946064132350).

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

201021211212210 is a wasteful number, since it uses less digits than its factorization.

201021211212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372199852 (or 372199849 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201021211212210 its reverse (12212112120102), we get a palindrome (213233323332312).

The spelling of 201021211212210 in words is "two hundred one trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, two hundred ten".