131420121 has 16 divisors (see below), whose sum is σ = 200524800. Its totient is φ = 74997648.

The previous prime is 131420111. The next prime is 131420143. The reversal of 131420121 is 121024131.

It is not a de Polignac number, because 131420121 - 2¹¹ = 131418073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131420121.

It is not an unprimeable number, because it can be changed into a prime (131420111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13890 + ... + 21348.

It is an arithmetic number, because the mean of its divisors is an integer number (12532800).

Almost surely, 2^131420121 is an apocalyptic number.

It is an amenable number.

131420121 is a deficient number, since it is larger than the sum of its proper divisors (69104679).

131420121 is an equidigital number, since it uses as much as digits as its factorization.

131420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 131420121 is about 11463.8615221922. The cubic root of 131420121 is about 508.4176523273.

Adding to 131420121 its reverse (121024131), we get a palindrome (252444252).

The spelling of 131420121 in words is "one hundred thirty-one million, four hundred twenty thousand, one hundred twenty-one".