122144447778221 has 12 divisors (see below), whose sum is σ = 134279439149856. Its totient is φ = 111022631386920.

The previous prime is 122144447778163. The next prime is 122144447778247. The reversal of 122144447778221 is 122877744441221.

It is not a de Polignac number, because 122144447778221 - 2¹⁰ = 122144447777197 is a prime.

It is a super-2 number, since 2×122144447778221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122144447778121) 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 in 11 ways as a sum of consecutive naturals, for example, 80039555 + ... + 81551328.

It is an arithmetic number, because the mean of its divisors is an integer number (11189953262488).

Almost surely, 2^{122144447778221} is an apocalyptic number.

122144447778221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122144447778221 is a deficient number, since it is larger than the sum of its proper divisors (12134991371635).

122144447778221 is a wasteful number, since it uses less digits than its factorization.

122144447778221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161597152 (or 161597141 counting only the distinct ones).

The product of its digits is 11239424, while the sum is 56.

The spelling of 122144447778221 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 twenty-one".