131331163121 has 2 divisors, whose sum is σ = 131331163122. Its totient is φ = 131331163120.

The previous prime is 131331163099. The next prime is 131331163147. The reversal of 131331163121 is 121361133131.

It is a happy number.

It is an a-pointer prime, because the next prime (131331163147) can be obtained adding 131331163121 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101975480896 + 29355682225 = 319336^2 + 171335^2 .

It is a cyclic number.

It is not a de Polignac number, because 131331163121 - 2⁶ = 131331163057 is a prime.

It is not a weakly prime, because it can be changed into another prime (131331163151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65665581560 + 65665581561.

It is an arithmetic number, because the mean of its divisors is an integer number (65665581561).

Almost surely, 2^131331163121 is an apocalyptic number.

It is an amenable number.

131331163121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131331163121 is an equidigital number, since it uses as much as digits as its factorization.

131331163121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

Adding to 131331163121 its reverse (121361133131), we get a palindrome (252692296252).

The spelling of 131331163121 in words is "one hundred thirty-one billion, three hundred thirty-one million, one hundred sixty-three thousand, one hundred twenty-one".