201321220210 has 64 divisors (see below), whose sum is σ = 412991115264. Its totient is φ = 69992510400.

The previous prime is 201321220193. The next prime is 201321220267. The reversal of 201321220210 is 12022123102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72624 + ... + 638683.

It is an arithmetic number, because the mean of its divisors is an integer number (6452986176).

Almost surely, 2^201321220210 is an apocalyptic number.

201321220210 is an abundant number, since it is smaller than the sum of its proper divisors (211669895054).

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

201321220210 is a wasteful number, since it uses less digits than its factorization.

201321220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711439.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 201321220210 its reverse (12022123102), we get a palindrome (213343343312).

The spelling of 201321220210 in words is "two hundred one billion, three hundred twenty-one million, two hundred twenty thousand, two hundred ten".