201311323011 has 36 divisors (see below), whose sum is σ = 301317440008. Its totient is φ = 129510154368.

The previous prime is 201311323007. The next prime is 201311323091. The reversal of 201311323011 is 110323113102.

201311323011 is a `hidden beast` number, since 20 + 1 + 311 + 32 + 301 + 1 = 666.

It is not a de Polignac number, because 201311323011 - 2² = 201311323007 is a prime.

It is a super-2 number, since 2×201311323011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201311323091) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16668471 + ... + 16680543.

Almost surely, 2^201311323011 is an apocalyptic number.

201311323011 is a deficient number, since it is larger than the sum of its proper divisors (100006116997).

201311323011 is a wasteful number, since it uses less digits than its factorization.

201311323011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14340 (or 14308 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 201311323011 its reverse (110323113102), we get a palindrome (311634436113).

The spelling of 201311323011 in words is "two hundred one billion, three hundred eleven million, three hundred twenty-three thousand, eleven".