201221650710 has 160 divisors (see below), whose sum is σ = 546788642400. Its totient is φ = 53092661760.

The previous prime is 201221650639. The next prime is 201221650733. The reversal of 201221650710 is 17056122102.

201221650710 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 2 + 1 + 650 + 7 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 96323346 + ... + 96325434.

It is an arithmetic number, because the mean of its divisors is an integer number (3417429015).

Almost surely, 2^201221650710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201221650710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273394321200).

201221650710 is an abundant number, since it is smaller than the sum of its proper divisors (345566991690).

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

201221650710 is a wasteful number, since it uses less digits than its factorization.

201221650710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

Adding to 201221650710 its reverse (17056122102), we get a palindrome (218277772812).

The spelling of 201221650710 in words is "two hundred one billion, two hundred twenty-one million, six hundred fifty thousand, seven hundred ten".