201131203122 has 24 divisors (see below), whose sum is σ = 436580975376. Its totient is φ = 66921164856.

The previous prime is 201131203111. The next prime is 201131203123. The reversal of 201131203122 is 221302131102.

201131203122 is a `hidden beast` number, since 201 + 131 + 20 + 312 + 2 = 666.

201131203122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201131203095 and 201131203104.

It is not an unprimeable number, because it can be changed into a prime (201131203123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10204008 + ... + 10223699.

It is an arithmetic number, because the mean of its divisors is an integer number (18190873974).

Almost surely, 2^201131203122 is an apocalyptic number.

201131203122 is an abundant number, since it is smaller than the sum of its proper divisors (235449772254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201131203122 is a wasteful number, since it uses less digits than its factorization.

201131203122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20428262 (or 20428259 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201131203122 its reverse (221302131102), we get a palindrome (422433334224).

The spelling of 201131203122 in words is "two hundred one billion, one hundred thirty-one million, two hundred three thousand, one hundred twenty-two".