201216500220 has 96 divisors (see below), whose sum is σ = 577012548672. Its totient is φ = 52372389888.

The previous prime is 201216500179. The next prime is 201216500231. The reversal of 201216500220 is 22005612102.

It is a happy number.

It is a congruent 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, 449814 + ... + 777666.

It is an arithmetic number, because the mean of its divisors is an integer number (6010547382).

Almost surely, 2^201216500220 is an apocalyptic number.

201216500220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201216500220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288506274336).

201216500220 is an abundant number, since it is smaller than the sum of its proper divisors (375796048452).

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

201216500220 is a wasteful number, since it uses less digits than its factorization.

201216500220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328111 (or 328109 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 201216500220 in words is "two hundred one billion, two hundred sixteen million, five hundred thousand, two hundred twenty".