131223214012489 has 2 divisors, whose sum is σ = 131223214012490. Its totient is φ = 131223214012488.

The previous prime is 131223214012483. The next prime is 131223214012511. The reversal of 131223214012489 is 984210412322131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123585132103225 + 7638081909264 = 11116885^2 + 2763708^2 .

It is an emirp because it is prime and its reverse (984210412322131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131223214012489 - 2⁹ = 131223214011977 is a prime.

It is not a weakly prime, because it can be changed into another prime (131223214012483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65611607006244 + 65611607006245.

It is an arithmetic number, because the mean of its divisors is an integer number (65611607006245).

Almost surely, 2^{131223214012489} is an apocalyptic number.

It is an amenable number.

131223214012489 is a deficient number, since it is larger than the sum of its proper divisors (1).

131223214012489 is an equidigital number, since it uses as much as digits as its factorization.

131223214012489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 131223214012489 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, two hundred fourteen million, twelve thousand, four hundred eighty-nine".