122557142447 has 2 divisors, whose sum is σ = 122557142448. Its totient is φ = 122557142446.

The previous prime is 122557142419. The next prime is 122557142459. The reversal of 122557142447 is 744241755221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122557142447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122557142398 and 122557142407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122557142047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61278571223 + 61278571224.

It is an arithmetic number, because the mean of its divisors is an integer number (61278571224).

Almost surely, 2^122557142447 is an apocalyptic number.

122557142447 is a deficient number, since it is larger than the sum of its proper divisors (1).

122557142447 is an equidigital number, since it uses as much as digits as its factorization.

122557142447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627200, while the sum is 44.

Adding to 122557142447 its reverse (744241755221), we get a palindrome (866798897668).

The spelling of 122557142447 in words is "one hundred twenty-two billion, five hundred fifty-seven million, one hundred forty-two thousand, four hundred forty-seven".