131012200020004 has 24 divisors (see below), whose sum is σ = 231858071335800. Its totient is φ = 64767104328960.

The previous prime is 131012200019989. The next prime is 131012200020017. The reversal of 131012200020004 is 400020002210131.

It can be written as a sum of positive squares in 4 ways, for example, as 1795326650404 + 129216873369600 = 1339898^2 + 11367360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131012200020004.

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, 664239 + ... + 16200790.

It is an arithmetic number, because the mean of its divisors is an integer number (9660752972325).

Almost surely, 2^{131012200020004} is an apocalyptic number.

It is an amenable number.

131012200020004 is a deficient number, since it is larger than the sum of its proper divisors (100845871315796).

131012200020004 is a wasteful number, since it uses less digits than its factorization.

131012200020004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16886943 (or 16886941 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 131012200020004 its reverse (400020002210131), we get a palindrome (531032202230135).

The spelling of 131012200020004 in words is "one hundred thirty-one trillion, twelve billion, two hundred million, twenty thousand, four".