131031033221 has 12 divisors (see below), whose sum is σ = 146175494976. Its totient is φ = 117341216520.

The previous prime is 131031033179. The next prime is 131031033223. The reversal of 131031033221 is 122330130131.

It is a de Polignac number, because none of the positive numbers 2^k-131031033221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131031033193 and 131031033202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031033223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8073245 + ... + 8089458.

It is an arithmetic number, because the mean of its divisors is an integer number (12181291248).

Almost surely, 2^131031033221 is an apocalyptic number.

131031033221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131031033221 is a deficient number, since it is larger than the sum of its proper divisors (15144461755).

131031033221 is a wasteful number, since it uses less digits than its factorization.

131031033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16162792 (or 16162781 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131031033221 its reverse (122330130131), we get a palindrome (253361163352).

The spelling of 131031033221 in words is "one hundred thirty-one billion, thirty-one million, thirty-three thousand, two hundred twenty-one".