131110221 has 32 divisors (see below), whose sum is σ = 194664960. Its totient is φ = 77832000.

The previous prime is 131110219. The next prime is 131110237. The reversal of 131110221 is 122011131.

It is not a de Polignac number, because 131110221 - 2¹ = 131110219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131110197 and 131110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131110211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463146 + ... + 463428.

It is an arithmetic number, because the mean of its divisors is an integer number (6083280).

Almost surely, 2^131110221 is an apocalyptic number.

131110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131110221 is a deficient number, since it is larger than the sum of its proper divisors (63554739).

131110221 is a wasteful number, since it uses less digits than its factorization.

131110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 131110221 is about 11450.3371566081. The cubic root of 131110221 is about 508.0177068765.

Adding to 131110221 its reverse (122011131), we get a palindrome (253121352).

The spelling of 131110221 in words is "one hundred thirty-one million, one hundred ten thousand, two hundred twenty-one".