1020131255444 has 48 divisors (see below), whose sum is σ = 2129755770240. Its totient is φ = 418409400960.

The previous prime is 1020131255417. The next prime is 1020131255477. The reversal of 1020131255444 is 4445521310201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020131255444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8007974 + ... + 8134365.

It is an arithmetic number, because the mean of its divisors is an integer number (44369911880).

Almost surely, 2^{1020131255444} is an apocalyptic number.

1020131255444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1020131255444 is an abundant number, since it is smaller than the sum of its proper divisors (1109624514796).

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

1020131255444 is a wasteful number, since it uses less digits than its factorization.

1020131255444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16142448 (or 16142446 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 1020131255444 its reverse (4445521310201), we get a palindrome (5465652565645).

The spelling of 1020131255444 in words is "one trillion, twenty billion, one hundred thirty-one million, two hundred fifty-five thousand, four hundred forty-four".