201221001210 has 64 divisors (see below), whose sum is σ = 486772094592. Its totient is φ = 53233272576.

The previous prime is 201221001193. The next prime is 201221001227. The reversal of 201221001210 is 12100122102.

201221001210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201221001193) and next prime (201221001227).

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, 2686792 + ... + 2760668.

It is an arithmetic number, because the mean of its divisors is an integer number (7605813978).

Almost surely, 2^201221001210 is an apocalyptic number.

201221001210 is an abundant number, since it is smaller than the sum of its proper divisors (285551093382).

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

201221001210 is a wasteful number, since it uses less digits than its factorization.

201221001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74607.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201221001210 its reverse (12100122102), we get a palindrome (213321123312).

The spelling of 201221001210 in words is "two hundred one billion, two hundred twenty-one million, one thousand, two hundred ten".