122144447778121 has 2 divisors, whose sum is σ = 122144447778122. Its totient is φ = 122144447778120.

The previous prime is 122144447778083. The next prime is 122144447778163. The reversal of 122144447778121 is 121877744441221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122082279337225 + 62168440896 = 11049085^2 + 249336^2 .

It is a cyclic number.

It is not a de Polignac number, because 122144447778121 - 2²¹ = 122144445680969 is a prime.

It is a super-2 number, since 2×122144447778121² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122144447772121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61072223889060 + 61072223889061.

It is an arithmetic number, because the mean of its divisors is an integer number (61072223889061).

Almost surely, 2^{122144447778121} is an apocalyptic number.

It is an amenable number.

122144447778121 is a deficient number, since it is larger than the sum of its proper divisors (1).

122144447778121 is an equidigital number, since it uses as much as digits as its factorization.

122144447778121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5619712, while the sum is 55.

The spelling of 122144447778121 in words is "one hundred twenty-two trillion, one hundred forty-four billion, four hundred forty-seven million, seven hundred seventy-eight thousand, one hundred twenty-one".