131206223505131 has 4 divisors (see below), whose sum is σ = 131209969827552. Its totient is φ = 131202477182712.

The previous prime is 131206223505127. The next prime is 131206223505191. The reversal of 131206223505131 is 131505322602131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131206223505131 - 2² = 131206223505127 is a prime.

It is a super-2 number, since 2×131206223505131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131206223505091 and 131206223505100.

It is not an unprimeable number, because it can be changed into a prime (131206223505121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1873108676 + ... + 1873178721.

It is an arithmetic number, because the mean of its divisors is an integer number (32802492456888).

Almost surely, 2^{131206223505131} is an apocalyptic number.

131206223505131 is a deficient number, since it is larger than the sum of its proper divisors (3746322421).

131206223505131 is an equidigital number, since it uses as much as digits as its factorization.

131206223505131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746322420.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 131206223505131 in words is "one hundred thirty-one trillion, two hundred six billion, two hundred twenty-three million, five hundred five thousand, one hundred thirty-one".