131418121 has 2 divisors, whose sum is σ = 131418122. Its totient is φ = 131418120.

The previous prime is 131418107. The next prime is 131418163. The reversal of 131418121 is 121814131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129049600 + 2368521 = 11360^2 + 1539^2 .

It is a cyclic number.

It is not a de Polignac number, because 131418121 - 2¹¹ = 131416073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131418092 and 131418101.

It is not a weakly prime, because it can be changed into another prime (131418181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65709060 + 65709061.

It is an arithmetic number, because the mean of its divisors is an integer number (65709061).

Almost surely, 2^131418121 is an apocalyptic number.

It is an amenable number.

131418121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131418121 is an equidigital number, since it uses as much as digits as its factorization.

131418121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 22.

The square root of 131418121 is about 11463.7742912184. The cubic root of 131418121 is about 508.4150732182.

The spelling of 131418121 in words is "one hundred thirty-one million, four hundred eighteen thousand, one hundred twenty-one".