201120221111111 has 4 divisors (see below), whose sum is σ = 201121886589312. Its totient is φ = 201118555632912.

The previous prime is 201120221111107. The next prime is 201120221111129. The reversal of 201120221111111 is 111111122021102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201120221111111 - 2² = 201120221111107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201120221111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201120221111141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832557950 + ... + 832799483.

It is an arithmetic number, because the mean of its divisors is an integer number (50280471647328).

Almost surely, 2^{201120221111111} is an apocalyptic number.

201120221111111 is a deficient number, since it is larger than the sum of its proper divisors (1665478201).

201120221111111 is a wasteful number, since it uses less digits than its factorization.

201120221111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665478200.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 201120221111111 its reverse (111111122021102), we get a palindrome (312231343132213).

Subtracting from 201120221111111 its reverse (111111122021102), we obtain a palindrome (90009099090009).

The spelling of 201120221111111 in words is "two hundred one trillion, one hundred twenty billion, two hundred twenty-one million, one hundred eleven thousand, one hundred eleven".