131121322447 has 2 divisors, whose sum is σ = 131121322448. Its totient is φ = 131121322446.

The previous prime is 131121322441. The next prime is 131121322487. The reversal of 131121322447 is 744223121131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131121322447 - 2²³ = 131112933839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131121322441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560661223 + 65560661224.

It is an arithmetic number, because the mean of its divisors is an integer number (65560661224).

Almost surely, 2^131121322447 is an apocalyptic number.

131121322447 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121322447 is an equidigital number, since it uses as much as digits as its factorization.

131121322447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

Adding to 131121322447 its reverse (744223121131), we get a palindrome (875344443578).

The spelling of 131121322447 in words is "one hundred thirty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, four hundred forty-seven".