201201311220 has 192 divisors, whose sum is σ = 694706288640. Its totient is φ = 42369495552.

The previous prime is 201201311209. The next prime is 201201311263. The reversal of 201201311220 is 22113102102.

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 201201311220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2820351 + ... + 2890809.

It is an arithmetic number, because the mean of its divisors is an integer number (3618261920).

Almost surely, 2^201201311220 is an apocalyptic number.

201201311220 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 201201311220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347353144320).

201201311220 is an abundant number, since it is smaller than the sum of its proper divisors (493504977420).

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

201201311220 is a wasteful number, since it uses less digits than its factorization.

201201311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71014 (or 71012 counting only the distinct ones).

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

Adding to 201201311220 its reverse (22113102102), we get a palindrome (223314413322).

The spelling of 201201311220 in words is "two hundred one billion, two hundred one million, three hundred eleven thousand, two hundred twenty".