201220111011 has 8 divisors (see below), whose sum is σ = 270667760400. Its totient is φ = 132959601152.

The previous prime is 201220111009. The next prime is 201220111019. The reversal of 201220111011 is 110111022102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201220111011 - 2¹ = 201220111009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201220111019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296784486 + ... + 296785163.

It is an arithmetic number, because the mean of its divisors is an integer number (33833470050).

Almost surely, 2^201220111011 is an apocalyptic number.

201220111011 is a deficient number, since it is larger than the sum of its proper divisors (69447649389).

201220111011 is a wasteful number, since it uses less digits than its factorization.

201220111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593569765.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201220111011 its reverse (110111022102), we get a palindrome (311331133113).

The spelling of 201220111011 in words is "two hundred one billion, two hundred twenty million, one hundred eleven thousand, eleven".