201211103220330 has 256 divisors, whose sum is σ = 561303797243904. Its totient is φ = 45213687336960.

The previous prime is 201211103220277. The next prime is 201211103220353. The reversal of 201211103220330 is 33022301112102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 201211103220297 and 201211103220306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11103743670 + ... + 11103761790.

It is an arithmetic number, because the mean of its divisors is an integer number (2192592957984).

Almost surely, 2^{201211103220330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201211103220330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280651898621952).

201211103220330 is an abundant number, since it is smaller than the sum of its proper divisors (360092694023574).

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

201211103220330 is a wasteful number, since it uses less digits than its factorization.

201211103220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21989.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 201211103220330 its reverse (33022301112102), we get a palindrome (234233404332432).

The spelling of 201211103220330 in words is "two hundred one trillion, two hundred eleven billion, one hundred three million, two hundred twenty thousand, three hundred thirty".