131321121 has 8 divisors (see below), whose sum is σ = 178398720. Its totient is φ = 85895472.

The previous prime is 131321101. The next prime is 131321131. The reversal of 131321121 is 121123131.

It is a happy number.

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

It is not a de Polignac number, because 131321121 - 2¹⁴ = 131304737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131321121.

It is not an unprimeable number, because it can be changed into a prime (131321101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412801 + ... + 413118.

It is an arithmetic number, because the mean of its divisors is an integer number (22299840).

Almost surely, 2^131321121 is an apocalyptic number.

It is an amenable number.

131321121 is a deficient number, since it is larger than the sum of its proper divisors (47077599).

131321121 is an equidigital number, since it uses as much as digits as its factorization.

131321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825975.

The product of its digits is 36, while the sum is 15.

The square root of 131321121 is about 11459.5427919267. The cubic root of 131321121 is about 508.2899550073.

Adding to 131321121 its reverse (121123131), we get a palindrome (252444252).

The spelling of 131321121 in words is "one hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-one".