201220101011220 has 96 divisors (see below), whose sum is σ = 572675783433600. Its totient is φ = 52783919599104.

The previous prime is 201220101011213. The next prime is 201220101011227. The reversal of 201220101011220 is 22110101022102.

It is an interprime number because it is at equal distance from previous prime (201220101011213) and next prime (201220101011227).

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 201220101011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220101011227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109765759 + ... + 111583878.

It is an arithmetic number, because the mean of its divisors is an integer number (5965372744100).

Almost surely, 2^{201220101011220} is an apocalyptic number.

201220101011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220101011220 is an abundant number, since it is smaller than the sum of its proper divisors (371455682422380).

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

201220101011220 is a wasteful number, since it uses less digits than its factorization.

201220101011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221349897 (or 221349895 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201220101011220 its reverse (22110101022102), we get a palindrome (223330202033322).

The spelling of 201220101011220 in words is "two hundred one trillion, two hundred twenty billion, one hundred one million, eleven thousand, two hundred twenty".