131122431228 has 48 divisors (see below), whose sum is σ = 307490601600. Its totient is φ = 43488268224.

The previous prime is 131122431227. The next prime is 131122431287. The reversal of 131122431228 is 822134221131.

It is a super-2 number, since 2×131122431228² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131122431195 and 131122431204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122431227) 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, 1922275 + ... + 1989317.

It is an arithmetic number, because the mean of its divisors is an integer number (6406054200).

Almost surely, 2^131122431228 is an apocalyptic number.

It is an amenable number.

131122431228 is an abundant number, since it is smaller than the sum of its proper divisors (176368170372).

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

131122431228 is a wasteful number, since it uses less digits than its factorization.

131122431228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67866 (or 67864 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

Adding to 131122431228 its reverse (822134221131), we get a palindrome (953256652359).

The spelling of 131122431228 in words is "one hundred thirty-one billion, one hundred twenty-two million, four hundred thirty-one thousand, two hundred twenty-eight".