122144447778247 has 2 divisors, whose sum is σ = 122144447778248. Its totient is φ = 122144447778246.

The previous prime is 122144447778163. The next prime is 122144447778253. The reversal of 122144447778247 is 742877744441221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122144447778247 is a prime.

It is a super-2 number, since 2×122144447778247² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122144447778257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61072223889123 + 61072223889124.

It is an arithmetic number, because the mean of its divisors is an integer number (61072223889124).

Almost surely, 2^{122144447778247} is an apocalyptic number.

122144447778247 is a deficient number, since it is larger than the sum of its proper divisors (1).

122144447778247 is an equidigital number, since it uses as much as digits as its factorization.

122144447778247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157351936, while the sum is 64.

The spelling of 122144447778247 in words is "one hundred twenty-two trillion, one hundred forty-four billion, four hundred forty-seven million, seven hundred seventy-eight thousand, two hundred forty-seven".