131101232032405 has 4 divisors (see below), whose sum is σ = 157321478438892. Its totient is φ = 104880985625920.

The previous prime is 131101232032387. The next prime is 131101232032423. The reversal of 131101232032405 is 504230232101131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (131101232032387) and next prime (131101232032423).

It can be written as a sum of positive squares in 2 ways, for example, as 95061369003364 + 36039863029041 = 9749942^2 + 6003321^2 .

It is not a de Polignac number, because 131101232032405 - 2⁵ = 131101232032373 is a prime.

It is a super-5 number, since 5×131101232032405⁵ (a number of 72 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13110123203236 + ... + 13110123203245.

It is an arithmetic number, because the mean of its divisors is an integer number (39330369609723).

Almost surely, 2^{131101232032405} is an apocalyptic number.

It is an amenable number.

131101232032405 is a deficient number, since it is larger than the sum of its proper divisors (26220246406487).

131101232032405 is an equidigital number, since it uses as much as digits as its factorization.

131101232032405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26220246406486.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 131101232032405 its reverse (504230232101131), we get a palindrome (635331464133536).

The spelling of 131101232032405 in words is "one hundred thirty-one trillion, one hundred one billion, two hundred thirty-two million, thirty-two thousand, four hundred five".