131121131442 has 96 divisors (see below), whose sum is σ = 307676880000. Its totient is φ = 37142848512.

The previous prime is 131121131441. The next prime is 131121131443. The reversal of 131121131442 is 244131121131.

It is an interprime number because it is at equal distance from previous prime (131121131441) and next prime (131121131443).

It is a super-2 number, since 2×131121131442² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131121131441) 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 47 ways as a sum of consecutive naturals, for example, 17138434 + ... + 17146082.

It is an arithmetic number, because the mean of its divisors is an integer number (3204967500).

Almost surely, 2^131121131442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131121131442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153838440000).

131121131442 is an abundant number, since it is smaller than the sum of its proper divisors (176555748558).

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

131121131442 is a wasteful number, since it uses less digits than its factorization.

131121131442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8160 (or 8153 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

Adding to 131121131442 its reverse (244131121131), we get a palindrome (375252252573).

The spelling of 131121131442 in words is "one hundred thirty-one billion, one hundred twenty-one million, one hundred thirty-one thousand, four hundred forty-two".