131110421 has 8 divisors (see below), whose sum is σ = 146065080. Its totient is φ = 116851392.

The previous prime is 131110391. The next prime is 131110429. The reversal of 131110421 is 124011131.

It can be written as a sum of positive squares in 4 ways, for example, as 20124196 + 110986225 = 4486^2 + 10535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131110421 - 2¹⁰ = 131109397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131110396 and 131110405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131110429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173510 + ... + 174263.

It is an arithmetic number, because the mean of its divisors is an integer number (18258135).

Almost surely, 2^131110421 is an apocalyptic number.

It is an amenable number.

131110421 is a deficient number, since it is larger than the sum of its proper divisors (14954659).

131110421 is a wasteful number, since it uses less digits than its factorization.

131110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347815.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 131110421 is about 11450.3458899721. The cubic root of 131110421 is about 508.0179651923.

Adding to 131110421 its reverse (124011131), we get a palindrome (255121552).

The spelling of 131110421 in words is "one hundred thirty-one million, one hundred ten thousand, four hundred twenty-one".