131132021989 has 2 divisors, whose sum is σ = 131132021990. Its totient is φ = 131132021988.

The previous prime is 131132021941. The next prime is 131132022017. The reversal of 131132021989 is 989120231131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120293129889 + 10838892100 = 346833^2 + 104110^2 .

It is a cyclic number.

It is not a de Polignac number, because 131132021989 - 2⁷ = 131132021861 is a prime.

It is a super-2 number, since 2×131132021989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131132421989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65566010994 + 65566010995.

It is an arithmetic number, because the mean of its divisors is an integer number (65566010995).

Almost surely, 2^131132021989 is an apocalyptic number.

It is an amenable number.

131132021989 is a deficient number, since it is larger than the sum of its proper divisors (1).

131132021989 is an equidigital number, since it uses as much as digits as its factorization.

131132021989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 131132021989 in words is "one hundred thirty-one billion, one hundred thirty-two million, twenty-one thousand, nine hundred eighty-nine".