201111121221090 has 32 divisors (see below), whose sum is σ = 482668196734080. Its totient is φ = 53629465014144.

The previous prime is 201111121221089. The next prime is 201111121221169. The reversal of 201111121221090 is 90122121111102.

201111121221090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201111121221090.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525955 + ... + 20062374.

It is an arithmetic number, because the mean of its divisors is an integer number (15083381147940).

Almost surely, 2^{201111121221090} is an apocalyptic number.

201111121221090 is an abundant number, since it is smaller than the sum of its proper divisors (281557075512990).

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

201111121221090 is a wasteful number, since it uses less digits than its factorization.

201111121221090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20913946.

The product of its (nonzero) digits is 144, while the sum is 24.

Adding to 201111121221090 its reverse (90122121111102), we get a palindrome (291233242332192).

It can be divided in two parts, 201111121 and 221090, that added together give a triangular number (201332211 = T₂₀₀₆₆).

The spelling of 201111121221090 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, ninety".