131201404310021 has 16 divisors (see below), whose sum is σ = 132441766492464. Its totient is φ = 129966915047424.

The previous prime is 131201404310003. The next prime is 131201404310023. The reversal of 131201404310021 is 120013404102131.

It can be written as a sum of positive squares in 8 ways, for example, as 29540464192996 + 101660940117025 = 5435114^2 + 10082705^2 .

It is a cyclic number.

It is not a de Polignac number, because 131201404310021 - 2²² = 131201400115717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201404310023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799375661 + ... + 799539773.

It is an arithmetic number, because the mean of its divisors is an integer number (8277610405779).

Almost surely, 2^{131201404310021} is an apocalyptic number.

It is an amenable number.

131201404310021 is a deficient number, since it is larger than the sum of its proper divisors (1240362182443).

131201404310021 is a wasteful number, since it uses less digits than its factorization.

131201404310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181960.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 131201404310021 its reverse (120013404102131), we get a palindrome (251214808412152).

The spelling of 131201404310021 in words is "one hundred thirty-one trillion, two hundred one billion, four hundred four million, three hundred ten thousand, twenty-one".