21122344143424 has 14 divisors (see below), whose sum is σ = 41914651659734. Its totient is φ = 10561172071680.

The previous prime is 21122344143323. The next prime is 21122344143449. The reversal of 21122344143424 is 42434144322112.

It can be written as a sum of positive squares in only one way, i.e., 17647728846400 + 3474615297024 = 4200920^2 + 1864032^2 .

It is a super-2 number, since 2×21122344143424² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165018313557 + ... + 165018313684.

It is an arithmetic number, because the mean of its divisors is an integer number (2993903689981).

Almost surely, 2^{21122344143424} is an apocalyptic number.

It is an amenable number.

21122344143424 is a deficient number, since it is larger than the sum of its proper divisors (20792307516310).

21122344143424 is an equidigital number, since it uses as much as digits as its factorization.

21122344143424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330036627253 (or 330036627243 counting only the distinct ones).

The product of its digits is 147456, while the sum is 37.

Adding to 21122344143424 its reverse (42434144322112), we get a palindrome (63556488465536).

The spelling of 21122344143424 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred forty-four million, one hundred forty-three thousand, four hundred twenty-four".