243222420042121 has 48 divisors (see below), whose sum is σ = 271870513992000. Its totient is φ = 217383130508544.

The previous prime is 243222420042059. The next prime is 243222420042127. The reversal of 243222420042121 is 121240024222342.

It is not a de Polignac number, because 243222420042121 - 2¹¹ = 243222420040073 is a prime.

It is a super-2 number, since 2×243222420042121² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243222420042127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5743264855 + ... + 5743307203.

It is an arithmetic number, because the mean of its divisors is an integer number (5663969041500).

Almost surely, 2^{243222420042121} is an apocalyptic number.

It is an amenable number.

243222420042121 is a deficient number, since it is larger than the sum of its proper divisors (28648093949879).

243222420042121 is a wasteful number, since it uses less digits than its factorization.

243222420042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51098 (or 51085 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 243222420042121 its reverse (121240024222342), we get a palindrome (364462444264463).

The spelling of 243222420042121 in words is "two hundred forty-three trillion, two hundred twenty-two billion, four hundred twenty million, forty-two thousand, one hundred twenty-one".