201131220311 has 16 divisors (see below), whose sum is σ = 237295196160. Its totient is φ = 166825729440.

The previous prime is 201131220307. The next prime is 201131220313. The reversal of 201131220311 is 113022131102.

It is a cyclic number.

It is not a de Polignac number, because 201131220311 - 2² = 201131220307 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 201131220311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131220313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5279945 + ... + 5317901.

It is an arithmetic number, because the mean of its divisors is an integer number (14830949760).

Almost surely, 2^201131220311 is an apocalyptic number.

201131220311 is a deficient number, since it is larger than the sum of its proper divisors (36163975849).

201131220311 is a wasteful number, since it uses less digits than its factorization.

201131220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62414.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 201131220311 its reverse (113022131102), we get a palindrome (314153351413).

The spelling of 201131220311 in words is "two hundred one billion, one hundred thirty-one million, two hundred twenty thousand, three hundred eleven".