201201101220 has 96 divisors (see below), whose sum is σ = 645570148608. Its totient is φ = 45865492992.

The previous prime is 201201101209. The next prime is 201201101279. The reversal of 201201101220 is 22101102102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201201101196 and 201201101205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485499 + ... + 798818.

It is an arithmetic number, because the mean of its divisors is an integer number (6724689048).

Almost surely, 2^201201101220 is an apocalyptic number.

201201101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201201101220 is an abundant number, since it is smaller than the sum of its proper divisors (444369047388).

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

201201101220 is a wasteful number, since it uses less digits than its factorization.

201201101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284709 (or 1284707 counting only the distinct ones).

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

Adding to 201201101220 its reverse (22101102102), we get a palindrome (223302203322).

The spelling of 201201101220 in words is "two hundred one billion, two hundred one million, one hundred one thousand, two hundred twenty".