201021321210 has 16 divisors (see below), whose sum is σ = 482451170976. Its totient is φ = 53605685648.

The previous prime is 201021321199. The next prime is 201021321229. The reversal of 201021321210 is 12123120102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201021321210.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350355324 + ... + 3350355383.

It is an arithmetic number, because the mean of its divisors is an integer number (30153198186).

Almost surely, 2^201021321210 is an apocalyptic number.

201021321210 is an abundant number, since it is smaller than the sum of its proper divisors (281429849766).

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

201021321210 is a wasteful number, since it uses less digits than its factorization.

201021321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700710717.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201021321210 its reverse (12123120102), we get a palindrome (213144441312).

The spelling of 201021321210 in words is "two hundred one billion, twenty-one million, three hundred twenty-one thousand, two hundred ten".