201111311331 has 24 divisors (see below), whose sum is σ = 332056690784. Its totient is φ = 114898798080.

The previous prime is 201111311281. The next prime is 201111311371. The reversal of 201111311331 is 133113111102.

201111311331 is a `hidden beast` number, since 2 + 0 + 11 + 11 + 311 + 331 = 666.

It is not a de Polignac number, because 201111311331 - 2¹⁰ = 201111310307 is a prime.

It is a super-2 number, since 2×201111311331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201111311371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30465 + ... + 634941.

Almost surely, 2^201111311331 is an apocalyptic number.

201111311331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201111311331 is a deficient number, since it is larger than the sum of its proper divisors (130945379453).

201111311331 is a wasteful number, since it uses less digits than its factorization.

201111311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609771 (or 609768 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 201111311331 its reverse (133113111102), we get a palindrome (334224422433).

The spelling of 201111311331 in words is "two hundred one billion, one hundred eleven million, three hundred eleven thousand, three hundred thirty-one".