201111122101011 has 4 divisors (see below), whose sum is σ = 268148162801352. Its totient is φ = 134074081400672.

The previous prime is 201111122101003. The next prime is 201111122101051. The reversal of 201111122101011 is 110101221111102.

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 201111122101011 - 2³ = 201111122101003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201111122101051) 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, 33518520350166 + ... + 33518520350171.

It is an arithmetic number, because the mean of its divisors is an integer number (67037040700338).

Almost surely, 2^{201111122101011} is an apocalyptic number.

201111122101011 is a deficient number, since it is larger than the sum of its proper divisors (67037040700341).

201111122101011 is an equidigital number, since it uses as much as digits as its factorization.

201111122101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67037040700340.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 201111122101011 its reverse (110101221111102), we get a palindrome (311212343212113).

The spelling of 201111122101011 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred one thousand, eleven".