131121641231616 has 72 divisors (see below), whose sum is σ = 398828325429184. Its totient is φ = 37463326064640.

The previous prime is 131121641231569. The next prime is 131121641231617. The reversal of 131121641231616 is 616132146121131.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121641231617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12195087745 + ... + 12195098496.

Almost surely, 2^{131121641231616} is an apocalyptic number.

131121641231616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131121641231616 is an abundant number, since it is smaller than the sum of its proper divisors (267706684197568).

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

131121641231616 is an equidigital number, since it uses as much as digits as its factorization.

131121641231616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24390186267 (or 24390186253 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

Adding to 131121641231616 its reverse (616132146121131), we get a palindrome (747253787352747).

The spelling of 131121641231616 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, six hundred forty-one million, two hundred thirty-one thousand, six hundred sixteen".