131024021040020 has 24 divisors (see below), whose sum is σ = 275180168073384. Its totient is φ = 52403946722816.

The previous prime is 131024021040013. The next prime is 131024021040041. The reversal of 131024021040020 is 20040120420131.

It can be written as a sum of positive squares in 4 ways, for example, as 8518482798736 + 122505538241284 = 2918644^2 + 11068222^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131024021039974 and 131024021040001.

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, 353666057 + ... + 354036336.

It is an arithmetic number, because the mean of its divisors is an integer number (11465840336391).

Almost surely, 2^{131024021040020} is an apocalyptic number.

131024021040020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131024021040020 is an abundant number, since it is smaller than the sum of its proper divisors (144156147033364).

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

131024021040020 is a wasteful number, since it uses less digits than its factorization.

131024021040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707711659 (or 707711657 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 131024021040020 its reverse (20040120420131), we get a palindrome (151064141460151).

The spelling of 131024021040020 in words is "one hundred thirty-one trillion, twenty-four billion, twenty-one million, forty thousand, twenty".