131021444431420 has 24 divisors (see below), whose sum is σ = 275145375632400. Its totient is φ = 52408512567552.

The previous prime is 131021444431333. The next prime is 131021444431439. The reversal of 131021444431420 is 24134444120131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14457076 + ... + 21703684.

It is an arithmetic number, because the mean of its divisors is an integer number (11464390651350).

Almost surely, 2^{131021444431420} is an apocalyptic number.

131021444431420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131021444431420 is an abundant number, since it is smaller than the sum of its proper divisors (144123931200980).

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

131021444431420 is a wasteful number, since it uses less digits than its factorization.

131021444431420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8150637 (or 8150635 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 131021444431420 its reverse (24134444120131), we get a palindrome (155155888551551).

The spelling of 131021444431420 in words is "one hundred thirty-one trillion, twenty-one billion, four hundred forty-four million, four hundred thirty-one thousand, four hundred twenty".