42221323121 has 8 divisors (see below), whose sum is σ = 42724528200. Its totient is φ = 41718758400.

The previous prime is 42221323103. The next prime is 42221323127. The reversal of 42221323121 is 12132312224.

It can be written as a sum of positive squares in 4 ways, for example, as 5456896 + 42215866225 = 2336^2 + 205465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42221323121 - 2¹⁰ = 42221322097 is a prime.

It is a super-4 number, since 4×42221323121⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42221323127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26780 + ... + 291821.

It is an arithmetic number, because the mean of its divisors is an integer number (5340566025).

Almost surely, 2^42221323121 is an apocalyptic number.

It is an amenable number.

42221323121 is a deficient number, since it is larger than the sum of its proper divisors (503205079).

42221323121 is a wasteful number, since it uses less digits than its factorization.

42221323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320179.

The product of its digits is 1152, while the sum is 23.

Adding to 42221323121 its reverse (12132312224), we get a palindrome (54353635345).

The spelling of 42221323121 in words is "forty-two billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-one".