201111323202111 has 16 divisors (see below), whose sum is σ = 306473631830784. Its totient is φ = 114913900294464.

The previous prime is 201111323202059. The next prime is 201111323202113. The reversal of 201111323202111 is 111202323111102.

It is not a de Polignac number, because 201111323202111 - 2⁷ = 201111323201983 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111323202113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285298806 + ... + 286002851.

It is an arithmetic number, because the mean of its divisors is an integer number (19154601989424).

Almost surely, 2^{201111323202111} is an apocalyptic number.

201111323202111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201111323202111 is a deficient number, since it is larger than the sum of its proper divisors (105362308628673).

201111323202111 is a wasteful number, since it uses less digits than its factorization.

201111323202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571318430.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 201111323202111 its reverse (111202323111102), we get a palindrome (312313646313213).

The spelling of 201111323202111 in words is "two hundred one trillion, one hundred eleven billion, three hundred twenty-three million, two hundred two thousand, one hundred eleven".